Hope no one minds my bumping this, but just to let anyone on this thread know who is interested: the warden of Hanningfield Reservoir, Bill Godsafe, will be giving an illustrated talk on the history and development of the reserve at Shenfield Parish Hall this Thursday evening (18th).
It is run by Brentwood and Billericay Wildlife Trust. It starts at 8pm (although there will be some admin business of the Trust to get out of the way before the talk starts). Postcode of the hall is CM15 8LB.
I will be there myself as well