Sounds like this 1963 car has been through the mill, what a shame. It would be interesting to see how the RHD conversion was done, I guess it involved transplant of a donor dash and steering.
My reading of the codes is DB158 white grey with graphite grey hardtop, 'natural' light tan leather and brown carpet. Does it still match that?
Just checked your link - radically different from its original state! The 48,685 km sounds implausible, it'd be interesting to see how the 'complete maintenance history backs that up. I like the way the seller's modified ad emphasises the 1963 build ***That's right, it's 50 years old and an absolute classic*** but doesn't mention the RHD conversion!