The 404s start with the correct url for the site but are then suffixed after the forward slash with urls such as;
fs/201410/a_Royal_Mail_Item_Is_Currently_Being_Processed_For_Delivery_.html
/fs/201410/a_When_will_John_lewis_restock_the_Dr_Dre_beats_solo_hd_.html
fs/201410/a_Food_stalls_at_train_stations_in_London_.html
There are 10,000+ of these in my WMT account. I have never seen this before - any ideas?