This former BMC Training Unit is for sale;
http://www.ebay.com....0b9dc6#viTabs_0
It seems that it has some motor-racing associations; suitably re-liveried it would look nice in the paddock at a Historics meeting.
Searching "BMC Mobile Training Unit" produces some information on these vehicles.
Usual disclaimers. I have no interest in this and I have not met the owner; I became aware of it per medium of an advertisement in a motorhoming magazine.