Inspirational websites/blogs:
http://printpattern.blogspot.com/
http://www.telegraph.co.uk/ (their pictures are always good to look at)
http://www.patternpeople.com/category/blog/
Museums and Galleries:
V&A
Hayward Gallery
Tate (Modern and Britain)
Science Museum
Natural History Museum
Fashion and Textile Museum
National Gallery
National Portrait Gallery
British Museum
Somerset House
Royal Academy of Arts