Nah, these are 207's with the old style metal bayonet fitting, so no chance of them being put in the wrong way. Plus it was working for a bit.

I'm thinking that because of the cheapness of these led bulbs, the bayonet fitting might have been a bit loose, added that the bulb holder might have a bit of oxidisation in it, caused the bulb to stop working. I'm gonna give it a good goin over tomorrow.