Trott has so far batted for just over three hours and despite one or two alarms looked in the mood to continue his outstanding record against Sussex. He has now scored a double hundred, four centuries and five fifties in 26 innings against them.
Trott and opener Varun Chopra led a steady response for Warwickshire with a third-wicket stand of 125 after they had lost Ian Westwood and William Porterfield by the 12th over.
In Division Two, Derbyshire celebrated back-to-back victories for the first time this season in the Championship as they beat Glamorgan by six wickets at Derby. The home side needed only 70 minutes on the third day to reach their target of 73 and secure a 20-point haul although Glamorgan, who took only three points, made them work for their first home win in the Championship by taking three wickets.
Wayne Madsen, Ben Slater and Shivnarine Chanderpaul were dismissed before Wes Durston completed Derbyshire’s third victory over Glamorgan in two years.
Worcestershire’s seamers strengthened the club’s grip on the Division Two title by forcing Gloucestershire to follow-on at Cheltenham.
Having extended their first innings to 395 on the second day, with Daryl Mitchell finishing unbeaten on 167 and Craig Miles claiming 5-90, the visitors made short work of the home batting line-up, claiming maximum bowling points for the 24th successive game. At one stage Gloucestershire were 68-8 before they were eventually bowled out for 156, with two wickets each for New Zealander Mitchell McClenaghan on his Championship debut, Charlie Morris, Jack Shantry and Joe Leach.
With five overs left in the day, the hosts reached 10-1 in their second innings, losing captain Michael Klinger for five, and still trailed by 229.