Hi guys thanks for the replies. 
My car has started up. 
Where I work they use a lot of satellite gps system loads of Ariel's all over the place. 
A friend at work who also has a sub suffers from the same problem. 
He was told drive away or don't park close to the aerials and it will be fine. 
So I pushed it a bit away from the aerials & it started up fine.