A few friends of mine work for Homebase, and they said the interview was fairly standard about teamwork and experience of customer service, as Homebase are particularly meticulous when it comes to providing excellent customer care. Be aware of this when you apply: they like experience or an excellent ethic at the very least.
Agreeing with others, you need to make yourself sound like a very interesting person, without sounding cocky or arrogant, when asked about yourself. A tip I always give my clients when coaching for interviews is “Be honest but not too honest”. Tell them you enjoy socialising (promotes excellent communication) but not how many beers you sank last time you were out. Tell them you like spending time with family, but don’t mention children at a first interview (some interviewers can wrongly be judgemental and you are not required to tell them if you have a family).