Hertfordshire
- Broxbourne – Hoddesdon, Waltham Cross, Cheshunt, Waltham Abbey
- East Herts and surrounding areas – Knebworth, Walton and Stone, Welwyn, Hertford
- Stevenage, Royston
Essex
- Thurrock
- West Essex
- Harlow
- Epping Forest
South Essex
- Brentwood
- Basildon
- Romford
East London
- Redbridge
- Barking and Dagenham
- Waltham Forest
- Hackney
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