When GA saying they're accepting FCC passengers to/from Cambridge, I assume that's just becuase it's simpler than saying their tickets are valid anyway? Don't think Kings Cross/FCC only tickets exist Cambridge-London?
GA are also managing to lay on extra services:
GA are also managing to lay on extra services:
09:15, 09:45 & 10:45 Cambridge to London Liverpool Street calling at Whit P'way, Aud End, Stortford & T'Hale