Buggy (Liskeard PL14)

I got a Silver Cross buggy on Freegle and it has been wonderful for my twin 8 year old granddaughter who is non verbal autistic . Now one of the tyres has degraded so much that it falls off . I can bodge it for a while but if anyone has a similar buggy or a silver cross that is going spare I can collect and shift any scrap that may result . Thank you .