I would endorse the titles already suggested the 20 cd / LP Rubble series is still the definitive article in terms of compilations. Others you might want to investigate once you've gone through those are:

Circus Days (compiled by Phil Smee who did the Rubble series) Vols.1-6 (cd box set)

Electric Sound Show 5 CD box set - From the compilers of the vinyl only Incredible Sound Show Stories series. These are later 60s into early 70s stuff psych into prog psyche and very good quality

Psychedelia - 5 cd box set - Originally a 4 LP set (an extra disc was added for the CD box). A lot more British psyche and late 60s singles and re-mastered to a noticeable extent form the original CD issues more than a decade ago.

These should all be readily available on Amazon or eBay.

PM

And if you are feeling adventurous, why not check out the 1980s UK psych revival / continuum in:

'Another Splash of Colour: new psychedelia in Britain 1980-85' 3 cd box set

https://www.amazon.co.uk/Another-Splash-Colour-Psychedelia-1980-1985/dp/B01AWF28O8/ref=sr_1_4?s=music&ie=UTF8&qid=1503563054&sr=1-4&keywords=psychedelic+cd+box+set

PM

one of my favs is MARMALADE SKIES-3 cd's for £4 plus p&p from amazon is one of my favs

Thank you all for taking time out, since my post I have purchased a couple of your recommendations , I am on the start of a very expensive but wonderful journey...Thank You again