In fact, on the next page theres a Z12 XE for sale in Sheffield for £300:
"my old 1.2 engine is now up for sale due to me finishing my conversion to a zlet and obviously no longer require this unit
Engine runs very well i have owned since november 08 and had no problems what so ever and previous owner matt hill can confirm engine is sweet.
Comes with engine and gearbox both front driveshafts and loom on engine
Engine has covered just under 88k
Item up for sale at £300 collected from sheffield pics to follow later this evening
Thanks for looking "