After trying several options sealing the thing myself I decided to get it done properly. With quotes ranging from £115 to over £300 I went with the cheapest option as the guy seamed to be the most knowledgeable.
Now I have no leaks! Just waiting for the car to dry out now.
If anyone needs theirs done Id recommend a visit to South West Sunroofs in Devon. Its just the one guy in his garage and you get a free cup of tea from the guys wife.
I got the body seal and the glass seal done for £115. The glass seal has an extra lip on it which looks like it will seal better than the standard renault one.