Off the top of my head, the only thing I can think of is the possibility of a burger van by the 'bus station stops' in the town centre. Sainsbury's opens at 7am but the restaurant does not open until 8am. Waitrose opens at 8am as does its café I believe. Tesco's is open 24/7 except on Sunday's but sadly I don't know about the costa there (think it could even be a vending machine costa, not sure). Cafe's otherwise can't really think out anything that could be open but I am not certain - being so close to home I don't visit them (sorry).
Right having gone through the list... (
here)...I can't see anything sadly. I think there could be a burger van, as I said before, down by the car parks by the main bus stops on the one way system, but am not sure, which is the A559 Watling Street....
Even the café at Delamere Forest does not open until 9am... life is a touch dead around here
Depending on your route, there is always the truckers stop/service station at the
M56/M6 junction earlier on at Lymm which is accessible by A roads and has a MacDonalds, costa (probably closed at that time of day)...