From the RSPB website – note you have to book in advance !? :
Wallasea Wander
Saturday 30 August and Saturday 27 September
13:46 to 15:45 August, 9:30 to 11:30 September
Price: ?3 donation
Booking essential
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Find out more about the development of this exciting new nature reserve.Booking essential, limited spaces.Please contact 01268 498620 or southessex@rspb.org.uk to book a space.Please note that booking closes the Thursday before the walk date.Directions
Meet at: RSPB car park, Wallasea Island