Funny enough I'd just finished reading a couple of forum responses to blanking off the egr, some came up with "increased cylinder temps could cause engine failure" but think that's load turd. Most say runs better, better mpg and engine inlet stays cleaner...so that sounds good to me and should have no issues with MOT. I'm going to get wynne egr3 cleaner as well to give the inlet a clean up, then fit the blanking.
PS In response to question, it's not stuck all the time...car runs fine most days, then others it sometimes has a fraction lumpy idle and fuffy when on light loads, you can usually tell when it's going to play up. The worst it does though (which can be scary) is go to pull away, gives you bit of power then cuts power...car will then idle but not rev or very fluffy if does revs so you end up being stuck half way out of a junction! Ah! Twice in 2 months since I bought it.