SORTED ! Thanks Trevor - I also saw an article on another site = Remove poss then neg terminals from battery, leave for half hour, then open boot, keys in ignition - turn key so dash is lit - do NOT start engine - then close boot lid by hand, refit poss then neg terminals on battery (all in that order) remove key from ignition - press boot unlock button - done
I think what I did wrong after replacing the battery was opening the boot manually - not using the key fob, it must have confused the system !
This worked for me !! This resets the boot and all should be fine.
Hope this helps someone else.