Ok was bit quicker than i thought.
Wasnt sure on a couple of bits, where you could either use cross overs (as I have done in the plan, or 2 points (which i dont think will fit) Or what would be better is double slips.
The plan is drawn with settrack. 1st 2nd and 3rd radius curves for each loop.
PS although it looks like there are gaps, they are joined in the program
Now looking at it Im pretty sure you meant slips or double sets of points in some areas, as you cant currently get from the outside loop to the middle loop....
I only have the Hornby Setrack Prametre file, if anyone fancies playing with this (who has the peco files) i can always email the XtrkCad file. pm me.