Bonding tip needed

[flashbanger13]

Hi all.

I've got a towel radiator in a downstairs bathroom. It is T'd off a radiator in the dining room which is directly on the other side of a one skin wall. I've got nowhere to hide the clamps!
Any tips please?

 

[Spark123]

Can you bond the pipework before it enters the bathroom?

 

[flashbanger13]

It enters through a wall directly from a radiator on the opposite side which is in a dining room. There are two circuits and a shower which i can get to under the floor above, but this towel radiator is posing a tester.