Working on bath hot water pipe

[Barry98]

Dido are we to assume someone offended you but you putting helpful in bold ?

 

[mountainman]

School holidays are almost over!
Thank goodness.

 

[frankjames]

Hmm! Are you using an imperial ring when you connect the metric fitting on to the imperial pipe? I know metric nuts and rings fit on imperial pipe but you have problems with leaks like you seem to be having. Some compression fittings you may have to change the back nut as well.

This sounds like it could be it get and imperial olive,
good luck