@V8Druid I got those tracks free off a groundwork contractor who worked for us back in 2011! I'd helped them out with a few things, the job had gone well and I had previously asked them about where to buy replacement tracks for it - they just turned up with these one day as a thank you. Was nice of them, as they didn't have to do that. Shame we never used them after that - probably too professional for house bashing (or expensive!) Those tracks replaced the original JCB tracks that I bought it with. Being single pitch, they aren't expensive.
I would also recommend Digbits Camso tracks, been good for the last 1000hrs on the 8026 and no noticeable difference between them and the original Bridgestones that it came with.
Although when I popped into my local JCB dealer the other day they had a seriously good offer on bridgestone tracks going. I was tempted to buy a spare set for my 18z they were that cheap! So worth asking the question.