Hi Fishe,

That's not a stupid question at all and I'll be sure to include that information in future.
If it's dry we'll be outside at the Pavilion cafe (The small outdoor cafe on the opposite side of the actual Pavilion. You'll see lots of green chairs and tables outside a small old building) and if it's raining we'll meet upstairs at Marwood cafe on Ship Street.
Right now, the BBC forecasts rain across Sussex for tomorrow afternoon so watch this space for any updates. The forum phone will be switched on from 1pm so please do feel free to text or call to confirm our location.
Well, that all sounded rather complicated! It would be good for us to find a simpler system in future so any suggestions regarding a reasonably priced nearby cafe for when it rains would be welcomed.