A career-best 7-44 from South African Charl Willoughby inspired Somerset to an innings victory on a remarkable third day against Glos at Taunton.

They resumed at 0-0 in reply to 409 and shortly before lunch they were 106-1.

By tea they were 81-6 in their second innings, Willoughby with 6-10 as nine wickets tumbled for 55 in 24 overs.

After 0-60 in the first innings, Andy Caddick struck twice in the follow-on, in Somerset's first Championship win at Taunton since July last year.

To lose 20 wickets in a day on a track like that is hugely disappointing - it simply shouldn't have happened Mark Alleyne, Gloucestershire coach

Phil Weston and Hamish Marshall shared a stand of 76 in 14 overs after Craig Spearman departed early on, but Willoughby proved virtually unplayable from the Old Pavilion End with his swing and seam to finish with match figures of 9-84.

Acting skipper Andy Caddick was delighted by Somerset's performance.

"I asked the lads for certain things and they responded with all I wanted and more," he told the club's website.

"The pitch didn't do much more than usual and the ball didn't swing to any great extent. They just batted with absolutely no application and we kept the ball in the right place."

Gloucestershire coach Mark Alleyene was left fuming by his side's capitulation.

"We'll have a thorough debrief to see if we can identify where things went wrong. There can be no excuses and we have to hold our hands up," he said.

"To lose 20 wickets in a day on a track like that is hugely disappointing. It simply shouldn't have happened.

"I asked questions and tried to put things right, but it didn't materialise. We got it badly wrong."