Short answer: probably not, under the current ICO regime. But the fact that PECR are now enforced under the Data Protection Act 2018, rather than the 1998 Act, makes it in principle much easier for fines for cookie contraventions to happen.
By me, on the Mishcon de Reya website:
https://www.mishcon.com/news/unlawful-cookies-a-new-avenue-for-the-ico-to-issue-fines
informationrightsandwrongs 