...anyway, I shall compose a 'note' to CHP and send them an email....'just in case'....

Dear CHP,

My mobile was called by this number today 01515591686 - a message was then left upon the ansaphone service - a woman claiming to be 'jenny', calling from 'chelmer housing' about a book survey - she then said that she would make contact later on. Could you verify whether or not this is a bona fide call - or a nuisance call?

kind regards

Emily gyde, flat 2, ellis road, Clacton on sea, CO15 1FH.

there...sent it off to both CHP email addresses....on verra....