Tony Gilham's latest tweet:
Looking forward to next week & @Autosport_Show Meetings for @DunlopBTCC & @BritishGT #someoneold #someonenew #someoneborrowed #someone22
Could be for British GT, but this seems to hint that their driver will be running number 22.
So, my guess would be Paul Rivett as HARD's third driver? Either him or Jenson Button!