BKM307750 | Bank loss restriction: targeted anti-avoidance rule: situations where the TAAR would not apply
From HM Revenue & Customs · Banking Manual
HM Revenue & Customs would not consider the anti-avoidance rules to apply in the following situations:
The arrangement does not create a tax advantage overall to the UK group
The only reduction in tax is due to the claim and surrender of group relief between the two parties
The value of the tax advantage is less than 50 percent of the net overall value to the group of entering into the arrangement.