Competent crew practical course

A friend of ours is doing his rya instructors exam for cruisers. He is tested teaching 2 people to day skipper standard and 2 to competent crew standard. His test is next week on a bavaria 34 sailing from Gosport, mon 9 to fri 13th may.The 2 doing competent crew have pulled out, would anyone like to take their place? Cost is £250 + food.
It is a lovely boat we sailed it to Cherbourg last weekend, it is available for charter with or without a skipper.It sleeps 8.