OS X (Eastings)     530342
OS Y (Northings)    104037
Nat Grid            TQ303040 / TQ3034204037
Nearest Post Code   BN1 2FL
Lat (WGS84)         N50:49:16 (50.82121525061113)
Long (WGS84)        W0:09:03 (-0.1509322910983808)
Lat,Long (WGS84)    50.82121525061113,-0.1509322910983808
Lat (OSGB36)        N50:49:14 (50.820625951449706)
Long (OSGB36)       W0:08:58 (-0.14935598500017644)
Lat,Long (OSGB36)   50.820625951449706,-0.14935598500017644
what3words          fantastic.shut.gives
Open Loc/Plus code  9C2XRRCX+FJP