I appreciate your reply, which is more than valid....... I am thinking that run flats on each corner and having a spare that is the same as a front tyre....... 5000 UK miles (round trip) is a long way to go, relying on 4 tyres and nothing else..... once we are past the 7 hour delay of passing through the Poland/Ukraine border, I have a "dragon" that speaks the language and my experience of the garages in Ukraine, is that they tend to repair rather than getting you to pay to replace.

July is still a few months away, so I have time to wear down the tyres to a point where they need changing