Thanks for all the responses.
Flight's likely to be in the next month or so (I'm the long-term planning type!). I may ask to use their field for a first approach as I'm offering someone a first flight in a helicopter as part of the trip up.
I'll keep some change handy to pay off an 'minders' that offer their services. Fortunately the person I'm visiting is a local anyway, they should know the score...
I presume that Liverpool are fairly easy going if I need a basic service with Liverpool whilst skirting around and below their airspace.
Thanks again
Lafite