Try Honeyblond in Clacton or Lucie May in Ipswich...both well reviewed on here and fantastic value at £100 per hour...I believe both are working at the moment.
Slightly further afield are English Kat and Hannah Banks in Stowmarket...both smoking hot in their late 20s...again both well reviewed although you may have to check if they are currently working.
I sure there might be more around Colchester that others can recommend, but I’ve seen all 4 mentioned and had a great time with each.
Enjoy and let us know how you get on.