Fully fledged storm now over North Essex. Must be fairly entertaining now between Braintree and Colchester, very powerful convection in that direction ahead of the already strong storms moving through Hertfordshire. Meanwhile to my SSE low level cloud has parted to reveal a very thick glaciated anvil in the distance with some quite impressive mammatus developing. Quite a sight actually, if only I had a working camera! Also evidence of large cumulus to my SW, probrably S/SW London. Explosive convection to my South West with pileus, should it develop further it will brush to my immediate South before Long, effecting SE London and NW Kent. And now moderate rain from a developing updraft to my immediate East, rapid convection still going to my SW, but it is rathing pulsing and collapsing.