What's the route of the 130 bus - would it be a likely way for Tia to return from her shopping trip to Gran's house, or to her own home? The significance wasn't clear. (like much else!)
there are 3 ways to get back to the same place from Croydon Town Centre
Number 130 Bus
Number 64 Bus (which takes a very different route)
Tram
not sure which bus goes to NS's house but the Tram would have taken her pretty near it.
ETA: I lived in Croydon for about 15 years so i know the area reasonably well