Hi Rog The battery could have a dodgy cell, which could chuck up intermittent probs, my gut instinct tells me your problem could be starter motor related, sticky motor / solenoid, or perhaps just a loose electrical connection. Next time it fails to spin, give the starter motor a sharp rap with a stout bit of wood or metal bar, and try again, you may need to do this 2 or 3 times, check the wiring, if all seems well, as Tom points out I would get the battery tested. One thing in your favour at the moment, if you get stuck somewhere, being a manual you have the option of bump starting it! Good luck Steve