Coolant Sensor & 12v Charger

Couple of question's: - Car is 2003 Skoda Fabia Classic 1.2

1) How much am I looking all in (inc labour) to fit a new coolant temp sensor?

2) My 12v car charger in my car has not worked since I had it - just over a year ago - not sure what the problem, may even just be the fuse needs changing but before I get in to that. The port that the charger would plug into seems to have a small 'pin' like thing about a cm long sticking upwards in the middle of it thus preventing me fully plugging in any standard UK phone charger / sat nav's etc... Ive no idea if the car is an import on not so just wondering if anyone knows if this might be what a European 12v car charger port would look like? And if so can it be switched to a UK port easily?.. or if not what could be the problem with the port?

Thanks