With this track still to rubber in we've had a few drivers facing the wrong way in the last few moments.

Carlos Sainz in the Toro Rosso got it wrong initially, spinning off at turn one, while seconds later we saw the Williams of Valtteri Bottas getting it wrong.

Oh, and Lewis Hamilton has just pirouetted at the hairpin. No big drama. He gathers it all up and continues - but not before being passed by a slightly bemused Rosberg.

Nico Rosberg is keeping Lewis Hamilton honest. He's just improved his time and is now just 0.019secs behind his Mercedes team-mate.

Half an hour of this session remains.

If you're a thirty-something saddo like me, music and the BBC probably means eyeballing Legs and Co on repeats of Top of the Pops on BBC Four on Thursday night.

OK, more accurately, eyeballing Gill from Legs and Co on repeats of Top of the Pops on BBC Four on Thursday night.

But apparently the BBC does music in loads of other ways. There's radio stations and everything. So in honour of this, today has been designated BBC Music Day, which means we are clumsily going to shoehorn F1 and music together.

So let's get involved using #bbcf1: what are your greatest F1 songs?

No prizes for Fleetwood Mac's The Chain, which is of course the legendary BBC F1 opening tune, although it is an absolute belter.

But which pieces of music do you associate with this great sport? Or even, which songs can you think of that are written specifically about F1 - there are more, probably, more than you think.

Failing that, just give us some great 'drivers as songs' like you were doing in Monaco.

Andrew Benson
Chief F1 writer

"Williams had a dire weekend in Monaco, qualifying both cars well outside the top 10 and finishing 14th with Valtteri Bottas. The track exposed the car's lack of low-speed grip, which is both aerodynamic and mechanical.

"But the team are expecting a much better weekend in Canada, thanks to taking a fresh engine in both cars and what Bottas calls 'a small aero upgrade'.

"The Finn said: 'We should not be so far from Ferrari. We should be looking to beat Red Bull here and in Spain we were not that far off Ferrari, and if we can make a small step forward we should be pretty close. I can't say we will beat Red Bull but we will do the best we can to do it."

The Mercedes boys have not improved their times at the summit, but up to third place has gone the Lotus of Romain Grosjean. He's set a time 1.1secs off Lewis Hamilton's best.

The Ferrari of Sebastian Vettel is down to fourth, ahead of Felipe Massa's Williams and the Force India of Nico Hulkenberg.

Chris Evans on Twitter:, externalF1 Canadian GP practice - look out for Manor. Howdy partners!

Image source, Manor F1

Snaproll: If he does need to apologise it's between him and Grosjean. Why are the Massas of this world getting involved?

Dylan Hardman: Verstappen was at fault. He had no trust in Grosjean under braking, but he's young and naive so won't admit his mistake.

Mollie Ellen: He's paid the price with the end of his race and a 5 place drop. A racing incident that wasn't malicious and an obvious mistake.

Lee McKenzie
BBC F1 pit-lane reporter

"There are shards of metal right outside Max Verstappen's garage in the pitlane. You wouldn't want to be running your tyres over them."

Andrew Benson
Chief F1 writer

"McLaren's engine supplier Honda have used two development tokens for this race, but Fernando Alonso and Jenson Button are not expecting a power boost from the engine that still lags a long way behind the best.

"Alonso said the improvements were about 'reliability'; Button used 'efficiency'. 'We just have to get stuck in, get on with our place and see where we are,' Button added. 'There are long straights here. I think we have made some positive improvements, but whether it is enough we'll have to see.'"

Red Bull team radio: "Hamilton is P1, 1:16.6..."

Daniil Kvyat: "I don't need to know this. I don't need to know this."

Touchy.

The Mercedes boys are at least pushing the limits for their one-second gap to the rest, with Nico Rosberg running out of road on the entry to turn six and cutting the corner.

Moments later we saw a stunning slow-mo replay of Lewis Hamilton's rear wheel vibrating wildly under braking and turn-in.

Look out for more of those shots this weekend.

A 1:16.608 has Lewis Hamilton at the top of the pile with 30 minutes of this session nearly gone.

He's a quarter of a second quicker than Mercedes team-mate Nico Rosberg.

There is then a ONE SECOND gap to the rest, led by the Ferrari of Sebastian Vettel.

Hmm.

Jennie Gow
BBC Radio 5 live pit-lane reporter

Button back in the pits after saying the car was "still the same" last time out.

Not quite sure of the circumstances of this little drama, but it seems some tape running across the pit lane has been partly removed, leaving beneath a number of large metal shards, as the picture below indicates.

Interesting one. Session still running. Will give you more info if we get it.

Andrew Benson
Chief F1 writer

"Jenson Button was, in general, his usual jovial self on Thursday, but one subject definitely touched a nerve.

"McLaren chairman Ron Dennis went to Denmark with reserve driver Kevin Magnussen last week and in the course of an address to Danish businessmen effectively said that if he could source a big chunk of money from the country, Magnussen could be in the car next year. The comments were reported in the UK.

Image source, Getty Images

"Button's place at McLaren in 2016 is far from certain - the team have an option to keep him but could just as easily plump for Magnussen or their other protege, GP2 championship leader Stoffel Vandoorne. Button is well aware of this.

"Asked about Dennis's comments, Button said: 'I hadn't heard that. Whatever happens, happens. We all have throwaway lines. It was the case the end of last year as well, but I'm here. So there you go.'"

Mercedes on Twitter:, external We do have the softest compounds in the @pirellisport range for this race: Soft and Supersoft as per Monaco

Andrew Benson
Chief F1 writer

"In Monaco, Lewis Hamilton was stupendous in the opening laps of practice, going straight on to attack mode and lapping seconds faster than team-mate Nico Rosberg anyone else. He's doing it again here.

"Rosberg just did a one minute 23.011 on his first flying lap. Hamilton, dangerous walls notwithstanding, did a 1:20.287 - 2.724secs quicker."

There was plenty to discuss in the wake of the Monaco Grand Prix, one of the main topics being Max Verstappen's actions before and after he hit the back of Romain Grosjean into turn one.

Here's a few of your comments on the subject. Views on this or any topic to #bbcf1 please.

Cryo Lockdown: At fault? Yeah he had his part in the crash. Should he apologize? No, you are not in F1 to make friends, stand your own!

Tom McRae: Verstappen is way too young for F1. He needs to learn more in lower formulas.

LJW: It looked like Grosjean braked very early and Verstappen had committed to a lunge. Racing incident for me.

We've got just two times on the board 10 minutes into this session, and it's the Mercedes boys who are the early birds.

Lewis Hamilton sets a 1:20.287 and Nico Rosberg does a 1:23.011.

Formula 1 on Twitter:, external A few grey clouds are looming over the Canadian GP.

Image source, F1