I realise that it's more than eight years since he asked the question, but Grafarman might like to know that Millhouse Lane is very much still in existence. It went into storage for a while, but then found a home as the resident O Gauge layout at Ruddington Model Rail Club, at the Great Central Railway Nottingham. It's been reduced a bit in size and re-arranged to fit the available space, but Allan Downes' buildings still impress visitors.
We try to have it operating, along with the club's 00 Gauge recreation of Ruddington Station in the 1950s, and our Thomas layout, 10:30-4 whenever the GCRN is operating trains, though this is dependent on having enough volunteers available (Sundays tend to be better than Saturdays).