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 Sheerness didn't have its own church until mid 19th
 century.  SS Mary & Sexburga  at Minster has  records from

 Eastchurch, All Saints, from 1677;

 Warden, St James, marriage  register from 1754;

 Leysdown, St Clement from 1704 and

Harty,  St  Thomas the Apostle from 1679.
 AFAIK the PRs are all at
Maidstone and BTs at Canterbury.