The amount of mortgage products on the market has shrunk dramatically, and it is no longer usually very worth while attempting to switch mortgage when your initial deal has run out as all the rates and "processing fees" have jumped up. This is an impact on me as I can't "switch and save" now that my initial discount has finished. Other than that, I see no direct impact to me, but then I am probably in a more fortunate situation.
Mortgage approval rates have dropped dramatically - so that's caused by less folks remortgaging, and less houses being bought.
Obviously the various share indexes plummeting will impact any savings that are linked to such indexes (e.g. Shares ISA)