EGLL-LFRB approx. 274nm separation
Waypoints L09RF/GWC35 3.4nm separation
My 1hour flight successfully ended at LFRB with an excess of 466nm remaining of the overall distance to destination, and 232nm between waypoints L09RF and GWC35.
The weirdest part would be that shortly before, on approach roughly 10nm from LFRB, the remaining distance was 454nm, and the distance between L09RB and GWC35 decreased to 219nm.
I respawned to EGLL afterwards and was unable to replicate the discrepancy.
2016 IPad Pro 11.2