Thanks to Roger Clark for sharing this information.
Sheerness tides: https://www.peelports.com/media/4134…ess_2019_p.pdf
Chatham tides: https://www.peelports.com/media/4133/chatham_2019_p.pdf
PLA tides: http://www.pla.co.uk/assets/pla-tide-tables-2019.pdf (loads of useful info – distances, bridge heights, barrier information etc as well as tides for Walton, Margate, Shivering Sands, Southend, Tilbury etc)