Question: Clio 197 'Full' De-cat

After a bit of advice on my 197, appreciate any feedback;

The car currently has the 'main cat' removed, with a straight pipe welded in. The back box is a Yozza.

Debating whether to replace the pre-cat downpipe with a straight pipe from K-tec to free up the system and give a better throttle response (and sound).

I understand the emissions will fail an MOT with this mod, likely meaning the engine management light will be continuously shown on the dash.

Can this be removed with a re-map? & would you consider the mod worthwhile?

Cheers,
Jay