Coastal Manroot: Most complete Quaker libraries in the British Isles, as well as small, interesting ones?

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What would Friends suggest are some of the most complete Quaker libraries in the British Isles, as well as small, interesting ones? For example, what's in London, and are there any at Old Jordans, Brigg Flatts, etc.? (I added Friendly collection pages from Haverford, Swarthmore, Pendle Hill and Tripod, the last of which is a catalog of Bryn Mawr's, Haverford's and Swartmore's bibliographic holdings to World University and School's Quakers' wiki page - http://worlduniversity.wikia.com/wiki/Quakers_-_Religious_Society_of_Friends). I haven't checked in the San Francisco Friends' Meeting's small library itself yet, though.




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