Wing Jonny May comes back onto the field for Gloucester after his spell in the sin-bin.

But Quins win a penalty from the kick-off and Ruaridh Jackson kicks Harlequins into a 21-10 lead.

Image source, Rex Features

And it was indeed slightly offside. James Hook was ahead of the kick when it was played. No score.

A let-off for Harlequins and, particularly, for Marland Yarde.

Oh no, Marland Yarde, that's a shocker! He drops a simple catch behind the try line... And James Hook pounces to score!

But was Hook offside? Maybe...

Another three minutes remain until wing Jonny May can return to the field for Gloucester.

... But they respond now. They're up into the Quins 22.

However, Jack Clifford is there with a strong tackle to halt the attack.

Quins eventually clear and win a line-out.

Down to 14 men still, and now 15 points behind, Gloucester are in a slight state of shock.

Any instructions they received from David Humphreys surely went out the window there.

Harlequins get the second 40 minutes under way.

There could well be plenty of action to come in the second half, give the history between these two.

After all, this fixtures finished 39-39 last season!

Matching last year's 10 tries from here will be a tall order though...

The bad news for Gloucester is they'll have to play the first nine-and-a-half minutes of the second half with just 14 men.

Jonny May's deliberate knock-on was pretty cynical, it has to be said, after a decent carry from Quins' Mike Brown.

So, Joe Marchant's try is the key difference between the sides at the break.

What did you make of that first 40 minutes?

You can let us know via #bbcrugby on Twitter.

And that's the last act of the first half. Quins are the happier of the two teams as they trudge off down the tunnel.

From the resulting penalty, Ruaridh Jackson makes no mistake and gives Quins an 11-3 lead.

Gloucester's Jonny May gets a yellow for a deliberate knock-on.

For a split second, referee JP Doyle accidentally brings out the red card! But says 'sorry' and brings out the expected yellow instead. They all have a little laugh about it.

Penalty to Quins...

Quins win a penalty from the scrum and Ruaridh Jackson kicks a very simple three points to restore the five-point lead.

The atmosphere has definitely been lifted since the opening try. The ball is currently midway into the Gloucester half, with Quins to put the ball in at a scrum.

Greig Laidlaw gets Gloucester on the scoreboard, comfortably kicking through the posts after Quins were penalised on the floor.

England's Joe Marler crashes into Gloucester's Charlie Sharples and it is an huge hit! Sharples has the wind knocked out of him. Ouch.

A textbook tackle, though.