The Plymouth Proprietary Library - an 'old-style library', where there are informal drop-in sessions for the practice of watercolour painting - on the 1st and 3rd Wednesdays of the month, from 10:30am to 12 noon. Cost £4 to members of the library, £5 otherwise. Materials provided, and tuition for beginners.
Local charity Shekinah holds classes in its 'The Learning Exchange'. PWS president Robert Turner holds watercolour classes here, with the latest starting on 10th June '26, (4pm - 5:30pm). Cost free, but book in with Dagmar, details on the website....
Bruce MacAvoy's website - with remarkable scientific knowledge on aspects of colour. Here there is discussion on the best way to have a six-colour palette of the most vibrant colours possible.
Go to 'Secondary' palette page
Jeanne Dobie's website. Here, and in her book 'Making Color Sing', she shows examples of her work and techniques. Especially to be noted is her way of mixing colour when starting with a so-called secondary, such as green.
Belinda Reynell
https://belindareynell.com/
both of whom sounded excellent. Note: the latter doesn't hold workshops in watercolour, but does, for instance, in
water based oils.