It's probably 30 years since I used Kwikfit. Our last interaction when I went in for an MOT and two rear tyres went something like this: 'Your exhaust is marginal mate, I would replace it if I were you.' 'Aye, crack on and fit a new one mate, you fitted that one at MOT time last year and it has a two year warranty.' ......'Well it's not a FAIL, so I'll leave it for now...'
Had a similar experience but not MOT related, it had just failed at about 23 months. Yeah, go ahead and fit it mate, it's not two years old. It took a week before the bastard had the replacement in shock.