The introduction to the report on the UK IPO’s website says as follows:

“The issue of lookalikes is one that has been on the policy and business agenda for at least two decades. Well-known brands, and brand-owners' groups, have long advocated specific and adequate protection against lookalikes under United Kingdom law, particularly in the context of possible business-to-business harm. More recently, the issue has also become more prominent on the agenda of the European Union both in the context of so-called "freeriding" in relation to trade mark law, and with respect to possible unfair commercial practices.”

The report and its various annexes are available via the UK IPO’s website here and here (PDF).  Well worth a look...