This will be Narrow-bordered Five-spot Burnet Zygaena lonicerae rather than Five spot Burnet, which is extinct in Essex (see Brian Goodey's 2004 Moths of Essex). In grasslands supporting good quantities of its food plants (e.g. Meadow Vetchling, clovers) and which are left uncut during its development and pupation, then it can certainly occur in good numbers - but anywhere in Essex supporting large populations in our modern degraded landscape is good!
Your Forum
This forum has now been more or less replaced by the Club's Facebook page at 
The weblog below is for naturalists to use to report interesting sightings, ask questions, report on field meetings and generally post pictures and any information or questions generally relevant in some way to the wildlife and geology of Essex. You will need to register and be logged-on to post to the forum, and you need to upload pictures first, for use in posts. Find out more
The weblog below is for naturalists to use to report interesting sightings, ask questions, report on field meetings and generally post pictures and any information or questions generally relevant in some way to the wildlife and geology of Essex. You will need to register and be logged-on to post to the forum, and you need to upload pictures first, for use in posts. Find out more