Thanet's foreshore is a council-owned SSSI; detectorists must submit a free online notification (valid 2 years) before detecting and follow the PAS Code of Practice, backfill holes and avoid the chalk reef and roosting birds.
Covers
Minnis Bay/Birchington to Margate, Broadstairs and Ramsgate/Pegwell Bay
When
No fixed closed season; avoid disturbing wintering birds at high tide roosts.
Permission
Online notification form 'Metal Detecting - Thanet Coast' linked from thanetcoast.org.uk (https://bit.ly/2NBYsMU); renew every 2 years; age 16+; queries to thanet.coast@thanet.gov.uk.
Watch out for
Chalk reef and man-made structures must not be damaged. Pegwell Bay / Sandwich Bay NNR is managed by Kent Wildlife Trust - no detecting there without its written permission.
What the source says
"This form is intended as notification for metal detecting on Thanet Council's foreshore"
Tap any spot in England on the UK Detector map to check it against scheduled monuments, SSSIs, nature reserves, National Trust land and access land in one go. Free: 3 checks a day.