I live a five minute walk from the town centre - you could have parked on my drive in return for a Greggs sausage roll.
Seriously though there are often tales of people being caught out in the town centre car parks. With the railway station car parks frequently full by 8am the council set the prices to keep spaces for short stay customers.
Enjoyed trips on all three of those buses - the 66 to Oxford or the 46 to Hungerford are also worth a trip.