Birkett returns after missing last week's defeat to Northampton due to a knee injury. In the back row, Ian Clarke starts at No.6, with Paul Volley moving back to No.7
The side will again be captained by former Wales scrum-half Rob Howley, who is standing in for club skipper Lawrence Dallaglio for the duration of the World Cup.
Injury has deprived Wasps of the services of Will Green (shoulder), Phil Greening (ribs) and Jonny O' Connor (ankle) – O' Connor picking up his injury during a training session on Thursday.
London Wasps: 15 Tom Voyce, 14 Shane Roiser, 13 Fraser Waters, 12 Ayoola Erinle, 11 John Rudd, 10 Mark Van Gisbergen, 9 Rob Howley (captain), 8 John Hart, 7 Paul Volley, 6 Ian Clarke, 5 Richard Birkett, 4 Simon Shaw, 3 Craig Dowd, 2 Trevor Leota, 1 Tim Payne.Replacements: 16 Peter Richards, 17 Ben Gotting, 18 Mark Denney, 19 James Haskell, 20 George Skivington21 Peter Scrivener, 22 Alistair McKenzie.
Kick-off: Sunday, 14.00 BST, 13.00 GMT