**CLASS 73 ON THE LOOSE** Thanks to @albionyard for sharing this video of our first O gauge Class 73/1 joining in the final day fun at Britain's Biggest Model Railway yesterday. Southern Region electro-diesels are a rare sight at Heaton Lodge Junction but it performed beautifully, reinforcing its status as one of our most hotly-anticipated O gauge models to date. Sadly, our suggestion that the layout should have 750V DC third-rail fitted before its next public outing looks unlikely to be taken u