Postcode zones
✓ solid = full real-data average (100+ real postcodes checked).
• dashed = spot-checked against a few real postcodes, not a full average.
Plain dashed, no mark = estimated, not yet checked against real data.
Blinking coloured lines = main city roads (Narborough Road, Melton Road, Hinckley Road, Welford Road/Way, Tigers Way, Aylestone Road, Loughborough Road, and more), each road its own colour with its name on the line, live from OpenStreetMap.