A few days passed and in the end I decided that the Westover car is not for me as it had too many issues that in my opinion did not justify the sale price saving.
I contacted Williams and negotiated on the price a little further and also got a tow hook included in the deal. The dealer at Williams obtained all of the paperwork and the LF1 collectors pack and I visited them again today to check everything was present and correct.
The second visit to Williams went very well. I inspected the car again and checked over all of the paperwork, including the original invoice, LF1 Collectors pack, service book and all the manuals etc. A couple of items were missing including the toolkit and tyre inflator repair foam but I'm assured that this will be sorted. I have paid a deposit and have arranged to pick the car up in 10 days time.