Okay, with all that said guys...
I have been in touch with a 'possible' venue today.
Granted, it's not a pub, but given the time now available to find some where to hold the meet, well this place is incredibly easy to find, it has a 'huge' car park, and it also offers an on-site restaurant and toilet facilities - which is better than nothing!
The chap that I spoke with doesnt see any problem with us using a small area of the car park, or even with closing an area of the car park off for us, but he did say that he will need to check the events diary and run it past the General Manager (he's off today!) first - I will know more in the next day or so please keep your eyes peeled for any updates.