Yeah, that's why the original tyres were replaced a couple years ago, they still had some legal tread left
Grandad always drove steadily with it so its only had two sets of tyres in its life

Spare tyre has never seen the road lol
Judging by the pic of you on the track yours won't last as long
I was talking to somone yesterday and cambelts came up. His daughters seat had to get a new one and they quoted something like £300

Dad looked up our recipts last night and found our last change was about £30. It probably didn't need replacing, but as you say, rubber perishes and a belt is simple and cheap...