Roll up, Roll up! Rather than the usual Chieveley services meeting for a convoy, what about setting off a junction earlier?
Just north of J12 of the M4, there's a huge Sainsbury's that's open at 6am on Saturday. It has a Starbucks if you need coffee, and a petrol station that's going to be a helluva lot cheaper than a Motorway services one. There's a Maccy-Ds too if anyone needs to get brekkie on the way.
So how about it? 7:00am meet and 07:15 prompt depart (it is 10 miles or so further east than Chieveley so we will need to leave a little earlier).
http://binged.it/JNKpOO