I spoke to a gentleman at
https://callrova.com today. They specialise in
refurbing BCU's and he reckoned that apart from the possibility of the replacement RF module being faulty, it is likely that when my fusebox went (it was definitely badly damaged) it is common for there to be damage to the BCU as a result.. Personally, seeing that I haven't yet inspected it and additionally that water ingress is possible in that corner seeing that both front sunroof corner drains are in need of re-sealing (mastic has failed, I have headlining out and this is the next job) I think that once funds allow I might well be going down the route of having this done..
The price quoted is about £180 plus postage, I will have to send the ECU and keys as well so that when it all comes back it will be 'plug and play'. Apparently, if the BCU turns out to be undamaged, I would only pay for return postage.
Moron, I wonder if that's a road you might consider too?? assuming your fusebox is OK and failing diagnostics can't enlighten you further.. See what the others on here say to this, I'm still very green to landrovers and they are far more experienced than me, but I feel it's worth mentioning.
Meanwhile, till I have more funds, I'm going to continue on other areas of the vehicle, e.g. sunroof leaks (with headlining removed at least it's not going down the pillars onto my replacement fusebox lol) and ABS..
Thanks again everybody
all the best, Mark XF