Earlier on, Yorkshire squeezed home by one run against Northants. Here, for the stats minded, are their narrowest margins of victory by runs scored in the County Championship:

• 1 run v Northamptonshire, Headingley, 2021
• 1 run v Middlesex, Bradford, 1976
• 2 runs v Nottinghamshire, Trent Bridge, 1870
• 2 runs v Middlesex, Headingley, 1985
• 3 runs v Essex, Colchester 1991
• 3 runs v Somerset, Taunton, 2017
• 4 runs v Glamorgan, Cardiff, 1957

This is an excellent partnership for the home side, but with a maximum of 30 overs remaining, surely the target is our of reach?

Iain Cockbain adds two singles from the latest Callum Parkinson over to reach 47 not out, and Tom Lace is on 56 at the other end.

They have now added 120 in 36 and a bit overs.

After 18 dot balls faced, Gareth Roderick is under way with two runs off Simon Harmer.

Essex have conjured up one or two remarkable wins in the past few seasons, but doing so here looks beyond them.

Worcestershire are now 89 behind.

for Tom Lacepublished at 16:17 British Summer Time 2 May 2021

16:17 BST 2 May 2021

Gloucestershire 153-3 - target 348 v Leicestershire

A quick single on the off-side and Tom Lace has his sixth first-class half-century.

It's been a patient knock from the 22-year-old, with his 50 coming off 119 balls with five fours.

It also brings up the 150 for Gloucestershire. The hosts are slowing the game down right now.

Following today's wins by Lancashire and Yorkshire, here's how the Group Three table is looking after four rounds of matches.

Image source, BBC Sport

And the final session begins in Worcester too.

Back under way in Bristol.

Two quick wickets and we'll have a game on our hands.

Group One

• Essex 561-8 dec v Worcestershire 364 & 105-1 (f/o)

Worcestershire trail by 92 runs with 9 wickets standing

Group Two

• Leicestershire 421 & 201-9 dec v Gloucestershire 275 & 132-3

Gloucestershire need another 216 with 7 wickets standing

• Middlesex 357 & 117 v Somerset 268 & 209-6

Somerset won by 4 wickets

Group Three

• Sussex 328 & 154 v Lancashire 230 & 255-5

Lancashire won by 5 wickets

• Yorkshire 206 & 247 v Northamptonshire 234 & 218

Yorkshire won by one run

What a result! Now just two County Championship games remain.

Although I'm certain the match at New Road will finish in a draw.

Worcestershire trail by 92 runs as they hope to avoid an innings defeat. Essex will need nine wickets in one session to win.

Jake Libby has looked in superb with the bat for the Pears. He's currently unbeaten on 42 from 91. Tom Fell has 35 not out.

Image source, Rex Features

Cometh the hour, cometh the man - and today that man is Yorkshire captain Steve Patterson.

He finds just enough movement off the seam to find the edge of the bat and Jonny Tattersall does the rest as Wayne Parnell is caught behind for 33..

It is only the second time that Yorkshire have won a Championship game by one run - the first against Middlesex in 1976.

Northants have never previously lost by one run - they were beaten by two runs by Essex and Warwickshire in 1959 and 1970 respectively.

What happened there? Steve Patterson digs one in, Ben Sanderson plays an ugly defensive stroke. He makes no contact and they scamper a bye.

A largely uneventful session comes to an end. Unfortunately I think Gloucestershire are playing for a draw.

The run rate is just 2.93 per over.

Steve Patterson over-pitches but Wayne Parnell can only find the fielder on the cover boundary. He decides not to run. The next one is pushed away to point and the South African takes one this time.

Ben Sanderson drives and sets off for a single as the cover fielder makes the stop. Wayne Parnell wisely sends him back to ensure he will be on strike for the next over. Exciting, eh?

Duanne Olivier gives Wayne Parnell some width and he slashes away down to third man for a vital boundary.

A single to backward point follows, leaving two deliveries for Ben Sanderson to face with four needed for victory.

Ben Sanderson sees out the over, getting solidly in behind Steve Patterson's final two deliveries. No black clouds overhead now, so it looks like this game is going to be done and dusted very soon.

Wayne Parnell tucks Steve Patterson's fourth delivery away off his hope for a single. Two balls left for Ben Sanderson to face in the over.

A show of confidence by Northants number 11 by Ben Sanderson, who drives Duanne Olivier away for four runs. He is almost half-way to matching his first-class career batting average of 8.50.

Northants need 10 more to win - Wayne Parnell will face Steve Patterson at the other end.

Lewis Hill comes into the attack for the first time this game for Leicestershire.

He concedes a boundary off his second ball but the rest of his over is tight and asks a couple of questions of the two set batsman.

Tom Lace is on 31 not out off 91 and Ian Cockbain is unbeaten on 26 from 81. It's been a slow afternoon session.