You're not going to win
https://www.plus.net/help/legal/terms/ said:9. Moving home
9.1. If you want to move your broadband or fibre broadband service during your minimum term you may have to pay a home move fee as set out in the Price Guide or enter a new agreement with us with a new minimum term.
9.2. If you have fibre broadband, but we can't provide it at your new home, you can move to our broadband service without penalty.
9.3. If we can't provide any broadband service to your new home, you'll have to pay early termination charges as set out in the Price Guide.
9.4. Other home move charges (such as fees for installing a new line) may also apply as set out in the Price Guide.