AIM rules for companies – February 2010 (http://is.gd/BUhYKY – PDF, LSE), states, page 3:
If an AIM company ceases to have a nominated adviser the Exchange will suspend trading in its AIM securities . If within one month of that suspension the AIM company has failed to appoint a replacement nominated adviser , the admission of its AIM securities will be cancelled .
An AIM company must issue notification without delay of: … the resignation, dismissal or appointment of its
nominated adviser or broker
QPP were remiss in this.
I hope there is an appropriate response by the LSE and the FCA.