Met police chiefs will be questioned at City Hall over the arrest of dozens of protesters during the King's coronation.

The chair of the London Assembly's Police and Crime Committee, Caroline Russell, says she found the arrests "worrying" because the rules seemed unclear for protesters "trying to do it by the book".

The Green politician told the Today programme on Radio 4 she was particularly concerned over the arrest of Westminster City Council Night Star volunteers, who help people get home safely.

She said: “It seems absolutely extraordinary that those people who were volunteering -- they were out there handing out flip flops to people who could no longer walk in their high heels because they’d had a bit too much to drink and handing out rape alarms.

"It just seems extraordinary that they got caught up in the Met’s safety net. How? It just feels very odd.”

Ken Marsh, head of the Metropolitan Police Federation representing officers, said the event was policed "impartially" and with "balance".

London Mayor Sadiq Khan has also demanded “clarity” from the force’s leaders on the arrests.

Nick Johnson
Reporting from Reading

Let's hear more about one of the royal visits earlier today in Berkshire where the Duke and Duchess of Edinburgh dropped into a Guide Dogs charity branch near Reading.

Mark Gurney, who was previously a firefighter in London, got involved with the charity after he retired and said the group knew they were having an important visitor but they didn't know exactly who.

"I think it was brilliant, it wasn't expected. It was an amazing surprise."

Mark's dog Holly was on her best behaviour as she and other pups were put through their paces and trying their best to avoid distractions.

"The Guide Dog training programme is really structured.

"I think even Holly sensed we had some VIPs."

Here are some more pictures of the Prince and Princess of Wales’s visit to a Scouts club in Slough with their children a littler earlier.

Activities were broad ranging and included digging, archery and painting, as well as some marshmallow toasting.

Image source, Reuters

Image source, PA Media

Image source, Reuters

Image source, PA Media

Image source, Reuters

Let's have a closer look at what some of the King's grandchildren have been up to as part of a volunteering drive in Slough today.

Image source, Jessica Bradley

In South Wales, meanwhile, Colin and Ceri Guest have volunteered to open the doors of a famous local landmark - so people can visit.

The Pontypool Folly Tower was first built in 1765, before being demolished by the Ministry of Defence during WWII as a precautionary measure.

The folly was later rebuilt and officially opened by the King (then Prince of Wales) in 1994.

The couple explained to the BBC that the building relies on volunteers to stay open.

Craig Duggan
Reporting from Presteigne

Over the border from Cheshire to Wales next. A group of people in Powys have come to volunteer at 1st Presteigne Scout Group's hut, which was vandalised last year.

Among the things on the "to do" list were strimming, weeding, sanding and painting the hut.

87-year-old Peter Hood from Pilleth was one of the volunteers. He said: "This is how we should be on the country - everybody helping each other. The country would come to a standstill if it wasn't for volunteers and charities."

Also helping out today is nine-year-old Amelia and her mother Mel. Amelia, a member of the local cub group, said: "I think this is good because it helps the community."

Image source, Wayne Salisbury

Some of those who braved the wet weather (mentioned by our forecaster Simon King just now) are these residents of Willaston in Cheshire.

They've taken part in a litter pick as part of the Big Help out, local councillor Wayne Salisbury tells us.

"It was great to see so many younger residents playing their part in the community," he says.

Helpers were rewarded with cake and drinks afterwards.

Image source, Wayne Salisbury

Simon King
BBC weather presenter and meteorologist

It has been a very soggy morning so far across many parts of the UK.

While rain is broadly clearing away to the east throughout the afternoon, there will still be some showers around. Some of those heavy, even thundery – especially in Northern Ireland and south-west Scotland, where there’s a yellow warning in force for thunderstorms.

More persistent rain will start spreading into southern England throughout this evening.

Nick Johnson
Reporting from Reading

Much like the rest of the country, the charity Guide Dogs here in Berkshire is adorned in union jacks and all things red, white and blue.

Today in their pop-up Coronation Cafe, trainee Labrador retrievers were being put through their paces - this time with some royal guests.

I watched as the Duke and Duchess of Edinburgh attempted to put branded harnesses on the dogs, with Prince Edward saying: “Sorry, I don’t have any treats”.

His next challenge: how to encourage the puppies to restrain themselves from launching themselves at a union-flagged, cardboard London bus displaying an array of treats.

Prince Edward nervously escorted Sunny encouraging her not to go for the treats - which ended in success.

“Full marks”, one of the trainers declared!

As we mentioned in our last post, the prime minister has joined volunteers at a community centre in Hertfordshire.

Alongside his wife Akshata Murthy, Rishi Sunak has been preparing and serving lunch at a club for the elderly.

They chopped strawberries and parsnips and helped the team prepare today's food.

After helping out in the kitchen, the PM told people: "If the lunch today isn't as good as it normally is, you know whose fault that is".

We've been hearing from Prime Minister Rishi Sunak, who says it's been great to join volunteers at community centre in Hertfordshire as part of the nationwide Big Help Out.

Commenting on the weekend's Coronation events, Sunak says "no other country in the world" could have put on such a "dazzling spectacle". The prime minister and his wife hosted an event at Downing Street yesterday, for dignitaries, community figures and youth groups.

He is asked about the arrests of anti-monarchy protesters in London on Saturday. Sunak says the police are independent of government, and that they made the decisions they deemed best. The PM adds that he was grateful to the police for their "hard work".

Sunak's Conservative Party lost more than 1,000 councillors during last week's local elections in England. Asked about the results, the prime minister says it's "always disappointing" to lose hard-working councillors - but insists he will stick to the Tory party's core pledges.

Some more pictures of Princess of Wales and her children taking part in a volunteering drive in Slough have been released.

Image source, PA Media

Image source, pa

Image source, PA Media

Image source, PA Media

Image source, PA Media

The Prince and Princess of Wales' three children are all taking part in the Big Help Out today.

Prince George has been pictured using a screwdriver on a Scouts' hut, while Prince Louis was seen giving Prince William a helping hand driving a digger.

Across the UK, volunteers have been marking the Coronation bank holiday by getting stuck in and helping out their local communities.

Image source, Reuters

Image source, PA Media

Prince Louis and his mother Catherine, Princess of Wales have been pictured joining the Big Help Out volunteering effort in Slough.

They have been taking part in efforts to improve the 3rd Upton Scouts Hut.

Image source, PA Media

David Grundy
BBC Wales

People across Wales are being encouraged to use Monday's extra bank holiday to volunteer.

Rugby player Leigh Halfpenny joined a litter-pick in Newport along with retired star Jamie Roberts, while the Archbishop of Wales is raising awareness of plastic pollution at a beach clean in Gwynedd.

"I think the Coronation's a big event for the British public and it's a time when we should come together and something like this is a way of doing it," said Roberts.

Halfpenny added: "It's important we look after our communities and that's what the Big Help Out is all about."

• Read more here

Image source, Reuters

A striking image just in from outside Buckingham Palace where tourists have been jostling for space to see the Changing of the Guard - the first since the King was crowned.

The regular ceremony sees the Old Guard (the soldiers currently on duty) gather in front of the palace before being replaced by the New Guard, which arrives from nearby Wellington Barracks.

Image source, Reuters

Here's a snap sent to us by Reuters of one volunteering effort just a stone's throw from Buckingham Palace.

Volunteers have been planting native wild plug plants in Green Park in central London.

As the Royal Parks website explains, external, the wildflowers are intended as a tribute to Elizabeth II, and will also provide food for insects.

London history buffs might be curious to know that they're being planted in a formation which follows the route of the lost River Tyburn.

Image source, Reuters

Image source, .

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Pete Saull
Reporting from Hertfordshire

The prime minister and his wife are taking part in the Big Help Out themselves.

Rishi Sunak and Akshata Murthy are preparing food for older people at a village hall in Hertfordshire.

“Great, put him to work!” one woman tells me, slightly bemused by who’s making her lunch.

Chopping parsnips may well be a welcome distraction for the PM, after last week’s poor local election results for the Conservatives.

He’s expected to give an interview to broadcasters shortly.

Linda Anneh-Bu Moreria, who volunteers with a Scout group in London says the skills she has learnt volunteering has had a huge impact on her life.