Elise update.
After last weekends trip to M-Sport i decided that something needed done about the noise. It has a 2Bular sports exhaust on it which was always pretty loud however recently i noticed it was just getting a bit obscene. My apple watch has noise limit warnings on it and on the motorway it kept triggering the noise alerts. After i got home i was looking at the data in the health app and it was showing 95 db sustained noise on the motorway. Which was just a bit much. After a bit eBaying i managed to source a "Brand new, second hand

" Lotus unit. Cheeky offer of cash and pickup at £250 and the guy agreed.
Collected last week and fitted it on Friday night. On first start up i thought "Oh, Thats very quiet" however after putting the undertrays back on and taking it for a drive it actually sounds perfectly fine. Motorway test on the noise meter app say's 81 db so not quiet but much improved.
The 2Bular on removal has a rattle inside it so im expecting that the baffles have slowly collapsed. The good news on this is that its a repackable exhaust. The end is riveted on so im going to pop that off for a look inside. May be able to fix it and sell it on if I dont decide to re-fit it. They retail about £800.
ETA - My arse dyno says it feels a bit quicker with the new exhaust. Another indication that the 2Bular was not in the best health.