The bracing plate for the tap is catching the top of the worktop, which means the sink doesn't sit flush to the worktop, bracing plate pretudes out slightly pass the sink cut out hole.
The pictures below might help explain the problem better.

The white nylon bracing plate is the problem. As you can see it even sticks out further than the retaining clip brackets.

Above is a close up showing the part that doesn't go past the sink cut out.
I was thinking of cutting a bit of the nylon brace, might prove difficult to get right.
Or can I get another smaller one?
It's a franke bern kitchen tap.