But some rather silly pairings unfortunately - 27+31, 27+40, 56+27, 56+31. Still, a good selection of power, hope the event is well supported.
A tip for anyone going - 'leaps' between trains at Orton Mere are dodgy, it's normally impossible to arrive from Wansford and change trains onto the service going back there as you won't get round in time. The other way is normally ok if trains are on time as the service from Peterborough is due to arrive first.