Thanks for the advice chaps.
I had a quote from these people
They have quoted £1000 inc VAT for a conversion. Here is a reply to an email i sent them:-
We only can do a collection delivery service from inside 100 miles.
If you can come for conversion yourself then we can convert your vehicle.
We working with New generation multipoint sequential system OSCAR-N system.
We are approved by UKLPG association. The filler point can be installed next to petrol filling point.
All paperwork will be given to you after conversion.
If you have any further questions, please do not hesitate to contact me.
It sounds fairly good to me. Only thing is that it is 150 miles away.
I have heard that the inlet manifold needs removing but some companies claim they can do a conversion whilst drilling the manifold in situ? The one above quoted 3 days for a comversion.
If anyone knows of any good conversion specialists in the Yorkshire area it would be much appreciated. I called a couple in Hull, which is about 10 miles from me (not far enough lol) they are quoting £1500 + VAT. Seems a bit steep to me.