Engineering rotation

As the BGLR locomotive fleet gets bigger (though the layout doesn't) we've had to adjust our rotation policy to give more locos a go. We've decided to rotate the position of engineering train motive power, the Motorbahnwagen will share the duties with one of the shunter fleet every six months. Ruby thus has taken over this duty and is likely to continue until the Spring, then the Motorbahnwagen will return until the Autumn when it is likely Tango will take over.