Sorry, I thought being a common car, I could get a Haynes, but as it seems there isn't one.
I'll have a look at the golf MK4 or Audi A series ones and see how they stack up in terms of familiarity.
Sorry for the confusion!
I sent an email to Custom Codes to see when they could come and remap my car, just waiting for an email then it's up up up and away - lickety split!
Also been on the phone to John from DesignerWheels regarding a LOVELY set of TSW Crofts but unfortunately, they're not made to fit our beloved Leons.