Historic land value for CGT purposes

[MrsJervis]

DH inherited a parcel of agricultural land from his father several decades ago. Last year, we sold the land, and we now need to work out our CGT liability. Only problem is that we don't know how to work out the probate value of the land. The only sum we can find in documentation is the total probate value of late-FIL's entire estate (of which DH's land was just a very small part). We've contacted the firm of accountants who handled FIL's affairs at the time and who still look after the family farm but they can't find any relevant documentation. Does anyone know whether HMRC would accept an estimate from a local land agent? Or is there any other way of getting this information? All help very much appreciated. (Am also going to post this in Money in case anyone there has an idea.)

[MrsBertBibby]

A local surveyor should be happy to do a historic valuation, it's often done.

[Larsitter]

Also possibly the solicitors who wound up the estate rather than the accountants would have a list of the assets for probate when the father died.