Van Buuren drives Yadav to long off for a precious 50 run partnership in 76 balls.

66 to win.

Maiden by Ajaz Patel. His 14th in 38 overs.

Sylvester drives Salter and gets a thick outside edge. The ball flies just wide of slip and down to third man for a streaky four - and that's the Derbyshire 250.

Van Buuren takes two runs off the second ball of Yadav's over and drives the bowler down the ground for four with a big flourish of the bat.

The momentum is very much with the hosts now - who are just 71 runs short of victory.

Mark Church
BBC Radio London cricket commentator

The captain hits the winning runs and he jumps into the arms of Ryan Patel.

There is something very appropriate about Rory Burns hitting the winning runs.

Image source, Rex Features

Fittingly, it is captain Rory Burns who seals the title as he pulls Jonny Tattersall away for four to complete a 10-wicket victory.

It took them just six overs to score the runs they needed following Hampshire's defeat by Kent at the Ageas Bowl.

It is Surrey's 21st outright title and first since 2018 - they also shared it with Lancashire in 1920.

Burns finishes with 30 not out, with Ryan Patel on 19.

Sylvester is well down the wicket playing Salter to point and James Harris fumbles a run out chance.

As you were. This innings continues.

A couple of singles then Rory Burns reverse sweeps Jonny Tattersall for four. Only six more required.

That's decent over from Dom Bess. Just three singles from it. But Surrey are just cruising now with only 12 more needed.

Briggs bowls a full toss and Dent smashes the ball through extra cover for four. He's now on 33.

78 more runs needed to win.

Mark Church
BBC Radio London cricket commentator

It would be fitting if Rory Burns could hit the winning runs for Surrey. He was captain when they last won the title in 2018 and he is captain now.

He was there for every game in 2018 and he has played every game this season, too.

Jonny Tattersall is really racing through this over. He turns one past the edge of Ryan Patel's bat to end it.

Jonny Tattersall brings himself on. The first ball is a no-ball full toss which Ryan Patel helps over the keeper's head for four.

Four runs to Dent with a late cut behind point off Danny Briggs.

Van Buuren takes a single off Yadav and Dent sees out the over.

The nerves may be settling somewhat for the home supporters here at Bristol.

Rory Burns waltzes forward and hoists Ben Coad handsomely over mid-on for four. The scoring rate is over 10 an over - and just 23 more runs are needed.

Jonathan Doidge
BBC Radio Leeds cricket commentator

Positive play from Rory Burns. Surrey are not hanging about here. We have only had three overs.

Shot! Adam Sylvester is down the track to a full ball from Andrew Salter, which he thumps down the ground for four.

Not bad for a number 11.

Ajaz Patel beats the edge of Aitchison's bat at the other end but the number 10 survives. He's bowled 36 overs now.

Rory Burns runs Ben Coad to third man for a single.

The next ball is on the hip of Ryan Patel, who takes two steps forward and tucks it away fine for another boundary - 30 more needed for the title.

Van Buuren is nearly caught by Jacob Bethell as Hannon-Dalby gets a short ball to fly off the shoulder of the bat. Phew.

Gloucestershire need another 89.

This won't take long at this rate.

Spinner Dom Bess opens up from the other end and Ryan Patel cuts his first ball for four.

Tom Kohler-Cadmore is keeping for Yorkshire, which means Jonny Tattersall may bring himself on to bowl after their slow over-rate in the first innings.

Two boundaries end Ben Coad's opening over and Surrey have made a flying start. Rory Burns is 12 not out.