Ah - but the in flight vis is different to the reported vis - so techincally yes! I know that the reported met vis is the lowest seen, but you could judge it to be legal (if departing outside CAS)
Similar as an airfield in a Control Zone - you have to have the correct met criteria to take off and land. However, only you can say what the in flight weather is where you are so a transit is allowed (and choice of VFR/SVFR!!!)
(did you get the PM I sent you SATCO KB re: LCY fun day!!?!?)