2h15 - Carto: Stratford City. Put in the significant changes I spotted at the weekend, and adding a sixth level - and dots showing a seventh and eighth (!).
The development's levels, from top to bottom:
A/P9 & C/P2**
A/P8* & C/P1**
A/P7** & 2
A/P5 & 1
A/P3 & G & southern outside area
A/P2** & B/P2
A/P1 & LG & B/P1* & northern outside area
* = Only shown on map as a "tunnel" (dots)
** = Not shown on the map at all!
If this makes sense to you, then you are ideally placed to do this race!