Swim England have produced and just released a really hand sponsorship guide for clubs . This can be downloaded here: Swim England Sponsorship Guide for Clubs.
They have also created a number of word document templates so you clubs can copy and paste the content they find useful: Swim England Sponsorship Guide – editable templates.
Swim England are also process of pulling together a presentation so they can run this guidance via a WebEx session. They are hoping to deliver these early 2018.