Moeen Ali claimed the vital wicket of Shakib Al Hasan as England ended on top after day three of the first Test with Bangladesh in Chittagong.
The Worcestershire all-rounder made his vital breakthrough with the second ball of the day after the home nation had resumed on 221-5 in reply to England's 293.
Former New Road team-mate Shakib on 31 gave Moeen the charge and was stumped by Jonny Bairstow without addition to his overnight score.
It was Moeen's third wicket of the innings and sparked a collapse which saw the last five wickets tumble for 27 runs this morning, three of them to Ben Stokes who finished with 4-26 from 14 overs.
Moeen ended with figures of 3-75 from 22 overs.
England again ran into early trouble in their second innings and Moeen, who scored 68 in the first innings, again found himself coming to the wicket at a tricky time at 28-3.
This time he made a restrained 14 off 50 balls without a boundary before attempting to sweep Shakib and he was caught behind down the leg side via an under edge which ballooned up via his gloves.
England were then 62-5 – leading by just 107 – but Stokes and Bairstow figured in a century partnership to lead a revival.
Stoke made 85 and Bairstow 47 as England closed on 228-8 – an overall advantage of 273 runs on a pitch offering encouragement to the spinners.