Freshwater species sampling with BNA Essex led by Ken Biggins MBNA of Sandford Mill Stream, on the River Chelmer. Meet at 2pm by the footbridge that crosses Sandford milltail stream at the bottom of Brook End Road, Chelmsford, Essex CM2 6NY near  Sandford Mill, [5739,2061]. Approach from Chelmer Village Way, into Sandford Mill Road (go over road bridge over R Chelmer), then past the entrance to Sandford Mill Museum & take next right into Brook End Road down towards the Sandford Milltail Stream, & park towards the end on one side. (Please do not approach from Maldon Road to the south & into Sandford Mill Lane as parking is very limited on that side of the footbridge). Free to members, (& youngsters accompanied by appropriate adult), £3 for non-members. Contact: essex@bna-naturalists.org