I spoke with Lawrie earlier this week to see if I could get Brenda on the day. I e-mailed him yesterday about coming to watch and this was his reply:
Dear David, I have to inform the station staff of any details in order for them to complete security passes/checks for vehicles prior to them coming onto the base. OF COURSE there are security implications re:Harv748! However, you should be able to come to watch but avoid the early morning rush and ENSURE you bring some irrefutable evidence of identity with you. Hope to see you Sat. Cheers, Lawrie
I guess photo driving licence + passport should do.