The white one is the 3rd of 4 Farr Jupiters built, chassis #252. These later cars have a longer rear deck than MTJ 300. and as Allan L says is currently SORN'ed which is fairly positive. I don't think it's still owned by Doug Day, hopefully whoever has it now is taking slightly better care of it.
There are 2 other Farr Jupiters still about, which is pretty good going.