Bath taps not covering holes

[smallsteve1]

I’ve got a horrible feeling that the bath mixer tap I have purchased is not going to cover the holes completely in the bath and wonder what my options are. It’s too late to return the taps unfortunately. Just to complicate things slightly, each tap is Square as opposed to the more normal round shape.
Had a little look around, but not really finding any obvious solution. Anybody got any ideas?

 

[Madrab]

Use large SS washers or larger base plates

 

[Bod ...]

Send us some pictures..

 

[smallsteve1]

Send us some pictures..

I haven’t taken it apart yet as I wanted to find a potential solution, ahead of stripping it down.
What I do know is that the original tap had a 50 mm base, whereas new taps are only 40 mm.

 

[Bod ...]

But still pictures of existing and new taps

 

[smallsteve1]

But still pictures of existing and new taps

k, i’ve attached photographs as requested.

 

[oldbuffer]

The holes in the bath are usually 35 mm in diameter. You may be OK but you won't know until you remove the old. Remove it carefully in case you have to put it back at least temporarily.

 

[Bod ...]

I think you will be ok.