I went to turn my car on yesterday after a round of golf and the car would do the needle swipe on the speedo and then turn off instantly. Happened a while ago but had no problems since then and that was over 6 months ago. Bit worried it happened again yesterday. Could it possibly be the battery? After leaving it for a couple of minutes I was able to start it fortunately

It's a very 'immobiliser-ish' sounding