Right lads an update on the remanufactured strut.
The garage I used took off the old strut and put on the new one.
It didn't work. They call me to say the compressor was heating up and the strut was failing to rise.
This garage services range rovers and other air suspension cars so they know all about jacking modes etc.
Result was good and bad.
The bad was that the strut wouldnt work so to check, they put the old one back on remembering that it only had a minute leak.
The good news is that now the old strut functions 100% correctly. I can only assume that the air pipe within the olive had a small crack and when they replaced it with a new olive and cutting the pipe back it sealed itself effectively.
That's not the end.
I informed the company I bought the strut from and they offered me my money back. I thought for what I'd paid for it I'd prefer another strut. They didn't gave another one so they offered me half the money £80 and keep the strut.
I have agreed to this and will take the remanufactured strut apart and see if I can find out what the problem was and hopefully, solve it then I might end up with a good relatively new strut.