Our reporter at the one of the south Wales valleys counts, which could be among the earliest to declare in Wales. 

Welsh Secretary Alun Cairns says: "I am pleased that leading Leave campaigners have been quick to write to the PM to show their loyalty to him.

"This shows that our united focus will now be on the manifesto."

The names of Welsh MPs Chris Davies and James Davies appear on the letter, but not that of former Welsh Secretary David Jones, who led Vote Leave Cymru. 

Guto Harri was Boris Johnson's communications director during the first part of his period as London Mayor.

The two men have different views on Europe, and Mr Harri helped the Remain campaign in Wales.

He says Boris Johnson transformed the Leave campaign from "a fundamentally negative one with a crew of slightly odd-looking people, social misfits, obsessed with a subject which others weren't interested in. 

"Boris turned it into something which 'normal' people believed in," Mr Harri told the BBC Wales results programme for S4C. 

Delyn MP David Hanson tells Mark Hutchings of BBC Radio 5 Live the early indications are that there will be a Leave vote in Flintshire, but not by as much as he had feared.

Our guest expert's view on when to expect some results from Wales. 

Pontypridd AM Mick Antoniw said it looked as though there would be a "good turnout" in Rhondda Cynon Taff. He said turnout for boxes by 20:00 BST was between 55% and 77%.

"Certainly there's been a significant swing towards the Remain grouping in terms of the feedback we are getting."

But he said he expected postal votes returned two weeks ago, because of the age profile of a "number of postal voters", would be weighted towards the Leave camp.

"But I would expect that a higher proportion on those turning up on the day would be towards Remain," he added.

Welsh MPs Chris Davies and James Davies are among pro-Brexit Tories pledging support for David Cameron, despite having campaigned against him.

Plaid Cymru's Lord Wigley, prominent in the Remain campaign, felt they could have made a more emotional appeal to the voters.

"I'm far from happy with the nature of the campaign my side has run," he told the BBC Wales results programme on S4C. 

"Because I was arguing very early on, once I had a voice in there, that we should go for principles and touch the heart as well as the mind if we were going to be able to persuade people to work through the wind and the rain for this."

Bridgend council invites you to see democracy in action.

Does the City of London know something we don't? 

A poll by Ipsos Mori suggests the result will be 54% to 46% in favour of Remain.

YouGov put the outcome at 52-48.

Welsh language signs spotted at the UK's main results centre.

 A Vote Leave Cymru source tells us the situation in Wales is "tight" but "in play".

BBC Radio 5 live's Mark Hutchings reports: "86 per cent of postal votes sent out in Flintshire have been returned - the highest on record."

BBC Wales political editor Nick Servini says: "Remain in Wales say they were stronger than thought in Labour areas but postal votes favoured Leave."

Could Merthyr Tydfil be one of the first Welsh councils to declare a result?

BBC Radio 5 live reporter Mark Hutchings has spoken to former Welsh Secretary MP Peter Hain, who led the Welsh Labour In campaign.

The UK's last European referendum was held in 1975. 

This is how the Welsh results were announced on the BBC back then.