This journey started when Hornby introduced their Sentinel diesel shunter...one of these had been based in my local quarry (Raisby in County Durham...Hornby even made a model of this very locomotive!)...and then, more recently, Hattons announced their Andrew Barclay tank engine, again one of these had been based at Raisby...you can see where this was going...it just took me sometime to get there...   My previous attempt at building a model railway was a bit on the small size...so with bigger a