Many thanks for all the comments on my new layout. I've now decided to stick an extra board on for the sidings, making it a rather fat 'L' shape.
Trouble is, my layout dicates where this board had to go, and it's not ideally positioned for the correct direction of travel (thanks Chris for pointing that out). I have a 6ft x 6ft main layout, with a 45"x12" board to the bottom right (my shed dimensions really only allow this).
Although I'm primarily building the layout for operational interest, I would also like to add *some* scenery, and the separate sidings would free some space on the main board.
My plan allows for a twin main line, two loops off the inner main line for the station, and a third inner 'branch' line. The idea being I use the outer line for an express, the inner main line for a commuter, and the branch line as a small rural service.
Fred pointed out my poor use of 'kickbacks', so I'm now concious of using these. However, to make the best possible use of the sidings board, I need to take the branch line off the express line, but it would be in the wrong direction for use of the sidings. I can shorten the loops a little, and bring the sidings off in the right direction, but this makes them much shorter, and I have to use a kickback to make any use of this for a long train.
My options are to sacrifice the length of the loops to improve the sidings usability, possibly even losing the inner loop altogether, or just run the trains the wrong way (does that really matter if the overall effect of the display is good?).
Cheers.