Replying, Mike Atherton's unbeaten 39 took his Championship average to above 20.
Lord's is likely to see a three-day game as Gloucestershire need 252 runs to avoid an innings defeat. Middlesex declared at their overnight 513 for 7 and immediately set about the visitors. John Emburey took three wickets and only an eighth-wicket partnership of 72 between Ricardo Williams and Martyn Ball delayed Middlesex. Gloucestershire were eventually all out for 199.
When Emburey dismissed Dean Hodgson in the second innings it was his 1,500th first- class wicket.
Carl Hooper's 121 not out was his fifth Championship hundred of the season as Kent dominated at Canterbury. Somerset added just 20 to their overnight 88 for 1 as Tim Wren took 6 for 48 and Kent ended the day on 293 for 3.Reuse content