Parking on London Bridge Station Routes

Hi all, does anyone happen to know any decent areas where I can park and get to on the train from London Bridge? I'm going to be living a stone's throw from the station so until I sort out a parking permit / garage I need to find somewhere that doesn't charge £5ph to park! I only need the car rarely so I don't mind taking a 15-20min train ride each time I need it. It isn't an expensive car by any means but it was smashed up last time I parked in London so a reasonably secure area would be great.

Any recommendations gratefully received. If I meet any of you who helps me find parking a beer will be on me!

Thanks.