As If

Jamie spent his student loan on; clothes including a new leather jacket, a new mobile phone for Sooz, nights out with his friends including expensive cocktails and Sparky, an electric toy dog.

The outside of Jamie's parents house (where he previously lived in Seasons 1 - 3) has changed, and it is now a completely different house. The only explanation for this is that his parents have moved, but this is not stated in the episode at all.