British book makers

My friend told me that the British book makers are expecting the PAP to lose 2 GRCs and 3 SMCs. This means that 10 to 15 opposition MPs will be elected into Parliament, but the PAP will still form the government. He thinks that Aljunied is a sure loss for PAP, based on the estimate by MM, and the other GRC could be Holland Bukit Timah (as Tan Jee Say is quite capable) or Bishan Toa Payoh.