In looking at the HTML source it is doing this:
<li><a href="http://explore.bl.uk/primo_library/libweb/action/dlSearch.do?
vid=BLVU1&institution=BL&query=isbn,exact,9783596297283" target="_blank">British Library</a>
vs.
<li><a href="http://explore.bl.uk/primo_library/libweb/action/dlSearch.do?vid=BLVU1&institution=BL&query=isbn,exact,9783596297283" target="_blank">British Library</a>
Anonymous
The pattern has been updated to refect the British Library's new URL logic. The change was made in scripts/update_BLIC.sql 1.1. installed in r2017-236 on 2017-06-14. Closing.