Thanks! Hasn't cost too much so far which is why it didn't scare me off the car, maybe £200 in total for new carpet/mats, plastics, leather, trim etc. However the seats are another matter as a retrim will cost at least £700, and as you know sports seats are very hard to come by so I don't have much hope of a black set coming up any time soon.
The current plan is to pull all of the champagne 'paint' off them, and restore them to the original sand/grey colour which I actually quite like. Then I will either keep them as is and source some matching grey leather door card inserts, or sell them and buy some black seats. At the moment they are worthless, nobody is going to buy them in this condition. So I am just waiting for a dry day I can spend pulling all of the paint off as it's very time consuming.