For the Walthamstow heads (although I prefer and would recommend > Leyton > Jubilee Park > Orient Way > Velodrome > Olympic Stadium > over A12 > Victoria Park > London Fields instead)
http://content.tfl.gov.uk/q2-bloomsbury-walthamstow-map.pdf
But there are no hipster coffee shops in Bloomsbury.
@ChasnotRobert started
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For the Walthamstow heads (although I prefer and would recommend > Leyton > Jubilee Park > Orient Way > Velodrome > Olympic Stadium > over A12 > Victoria Park > London Fields instead)
http://content.tfl.gov.uk/q2-bloomsbury-walthamstow-map.pdf