Glamorgan trail Warwickshire by 207 runs with nine second-innings wickets remaining
Warwickshire's batsmen gorged themselves on runs as they exploited a flat track and an even flatter Glamorgan attack.
Both Jonathan Trott and Ian Westwood recorded career-best scores as Warwickshire posted their highest total for four months - since the last time they played Glamorgan.
Trott (247 deliveries, 19 fours) was in imperious form, pulling with disdain and using his feet with confidence to the spinners.
His horror run of form may have cost him a place in this winter's England Academy intake, but here he looked back to his best - balanced, positive and compact.
With Westwood he added 183 in 48 overs, soon overtaking his partner despite a 19-over start.
There were many fine shots, off the spinners - his supposed Achilles heel - as well as the seamers, though the style with which he dispatches the short ball is a particular delight.
He used his feet well to the spinners, dancing down the pitch and driving with rare precision and looked a very high-quality player.
Reaching his second century of the season with a firm drive through cover, his main emotion appeared to be relief. This run of form has hurt him, but he will emerge a hungrier, wiser cricketer for it. It may be the making of him.
It was a special day for Westwood. He recorded his maiden first-class century in front of his parents and will surely now win a prolonged run in the side.
Well-organised, compact and patient, Westwood (197 balls, 13 fours) has waited a long time for this opportunity.
He recently turned 23 and has been associated with the club for over a decade, but it took the current spate of injuries and England calls to open the door. Here he looked every inch a first-class opening batsman and this innings will surely kickstart a long and distinguished career for the club.
But perhaps the most impressive batting again came from Jim Troughton. Apparently rejuvenated after two fallow years, he produced some glorious strokes, and was largely instrumental in setting up the early declaration.
Particualrly harsh on the spinners, Troughton skipped down the wicket to loft Dean Cosker for two sixes before rocking on to his back foot to lash Robert Croft for boundaries through point.
Though Troughton (75 balls, three sixes and eight fours) fell in the push for quick runs, Dougie Brown (47 balls, eight fours and two sixes) thrashed a 38-ball half-century to sustain the momentum.
His innings included a furious pull for six off Wharf and a marvellous straight drive for another off Harrison, while Neil Carter (28 balls) and Luke Parker (21) ensured the lead was over 300 when the declaration came with 19 overs of the day left.
Surely, sterner tests await. Pitches will not often be this batsmanfriendly, while Glamorgan looked dejected long before the close and their fielding wilted noticeably. But Warwickshire can at least now approach the last phase of the season with confidence in their batting.
They did not have everything their own way, however. Glamorgan's openers also took advantage of the pitch second time around, with Mark Wallace racing to a 27-ball half-century full of savage cuts and pulls.
With Makhaya Ntini again producing a somewhat lacklustre display - he won't have come across many pitches like this before - and the other bowlers coming on to the bat in an alarmingly pleasing fashion, Glamorgan at least showed they had some fight left.
It was not just the bowlers who were the victims of the punishment, however. One pull from Wallace flew unerringly into the press tent and smashed The Birmingham Post's laptop into three pieces. It's a dangerous business, this cricket writing.
Dan Cherry fell before the close, top-edging an attempted hook, but there is much work left for Warwickshire today. Rain is expected - indeed, it started to pour moments after play ended last night - and nothing less than victory is acceptable against the division's whipping boys.
A contribution from Ntini (three overs for 33 last night) would make a substantial difference.
* Warwickshire's Dougie Brown, Durham duo Gavin Hamilton and Kyle Koetzer and Yorkshire's John Blain will miss out on Thursday's visit of Australia to Scotland because of county commitments