Just FYI for anyone, these are the British Library's copying regulations:
Onsite Self-Service paper copying regulations
Unless the item you are copying is out of copyright, or you have the written permission of the copyright holder, it is advisable to stay within the following limits:
Up to 5% or one whole chapter (whichever is the greater) from a book, report, pamphlet, etc.
Up to 5% or one whole article (whichever is the greater) from a single issue of a journal, magazine or newspaper
Up to 5% or one paper (whichever is the greater) from the proceedings of a conference
Up to 5% of an anthology of short stories or poems or one short story or one poem of not more than 10 pages (whichever is the greater)
Up to 5% or one single case (whichever is the greater) from a published report of judicial proceedings.
Please also note the following:
The copy can only be used either for:
Research or private study, neither of which may be for a commercial purpose
or
Criticism, review and news reporting
Unless it is impractical, the source of all copies must be acknowledged
You should only make a single copy, and this should not be further copied.
If the copy is needed for a commercial purpose, or if you cannot comply with the criteria above, you must have the prior permission of the copyright owner or pay a copyright fee.