Dim dash warning lights

Hi all, strange one this, I have 2009 1.9tdi Elegance, doesn't get used that much cerainly not during winter. Drove down to inlaws Friday night 120 miles, half way down I noticed the bonnet open warning light on dash was glowing, we stopped for a coffee and I checked bonnet was secure and it was. When we restarted for the resy of the journey I had the bonnet open and the left indicator warning glowing. Completed journey all okay. Been out today, no glowing lights at all, did about 20 miles. Pulled back into drive, stopped car and opened door and bonnet open lamp glowing again. Any ideas? Battery seems okay starts first time on the button, obviously driving on the way down we had lights, radio, wipers, heater etc on so I thought the battery might be a bit low and after todays run I thought yes I was right but now I seem to be back to same again.