Worcestershire's seamers strengthened the club's grip on the Division Two title by forcing Gloucestershire to follow-on in the LV= County Championship match at Cheltenham.
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Having extended their first innings to 395 on the second day, with Daryl Mitchell finishing unbeaten on 167 and Craig Miles claiming five for 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 for eight 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 for one in their second innings, losing skipper Michael Klinger for five, and still trailed by 229.
Worcestershire began the morning on 299 for seven and suffered an early setback when Shantry, having hit a couple of boundaries, was bowled by Miles for 21.
McClenaghan enjoyed his first Championship innings, helping Mitchell add 61 in less than 12 overs before advancing down the pitch to Smith and being stumped for 18.
By then a fourth batting bonus point had been secured and the wicket, which fell in the 110th over, gave Gloucestershire a third bowling point.
Mitchell had cast aside his first day caution to play with increasing freedom and brought up his 150 off 283 balls, with 22 fours.
He added 65 to his score off 21.3 overs, including a six over square leg off Miles, before last man Morris fell lbw to Will Gidman, having supported his partner solidly for half an hour without scoring.
Soon McClenaghan was generating more pace from the Festival pitch than any Gloucestershire bowler with his left-arm seam, accounting for Klinger (four) with a lifter that the home skipper gloved to wicketkeeper Ben Cox.
It was 11 for one at lunch and the hosts plunged deep into trouble at the start of the afternoon session as three wickets fell with the score on 15.
Will Tavare (two) had his middle stump uprooted by McClenaghan and four balls later Alex Gidman was bowled off a pad by Morris for nine. The next delivery saw Ian Cockbain connect solidly with a straight drive, which Morris deflected onto the stumps at the bowler's end to run out Hamish Marshall without facing a ball.
Cockbain and Will Gidman took the score to 53 before the latter was pouched at leg-slip by Tom Fell off Shantry for 18. It was 60 for six when Cockbain edged a catch to second slip off Leach and departed for 25.
Benny Howell then suffered a rush of blood, advancing to try and hit Shaaiq Choudhry over the top and being stumped by Cox with the score on 62. At tea Gloucestershire were 68 for seven and staring down the barrel of a follow on.
It came a step nearer when the second delivery after the break saw Morris pin Adam Rouse lbw for three, but then Miles and Tom Smith offered some resistance - putting on 54 before Miles drove Shantry (29) to mid-off.
Smith looked more comfortable than the top order, coming in at nine and finishing unbeaten on 41 in a sorry batting effort. He added a further 34 with Liam Norwell (18) before the last man was caught at fine leg off a top-edged pull to give Leach his second wicket.
With the follow-on enforced, Gloucestershire's miserable day continued when Klinger nicked Morris to wicketkeeper Cox.
Worcestershire bowling coach Matt Mason was pleased with his side's bowling and batting performance, and said: "The day was set up for us by the fantastic way Daryl Mitchell batted with the tail.
"Then it was great to see Mitchell McClenaghan running in and bowing genuinely fast.
"It was a quality opening spell, well supported by Charlie Morris, and things went from there."
Gloucestershire director of cricket John Bracewell rued his side's poor show, saying: "The players are a bit down in the dressing room and I wouldn't expect anything else.
"We didn't bat well enough and I want them to be more accountable. There is a lot to do tomorrow, but we have shown spirit with backs to the wall before this season."