I invested heavily in AVCs from the beginning. Always 12% on top of my final salary (since closed). Sharesave allows you to save £250 per month (after tax) and have the option to buy shares at a predefined discount after three years. The £250 per month is the sum of all agreements over all three possible years.
AVCs get tax relief at your marginal rate. Sharesave is just a bet that the shares will increase in value and that the discount is useful (say 20%). Ours don’t seem to go up, and have some years been underwater (you get your money back with modest interest). My view at 53 is put all you can in AVCs, you should be saving at least half your age or 26%. You can take 25% of any lump sum in due course. So it really is tax free at the moment. It’s relatively near-term but not immediately accessible money for me that’s a good thing
Btw the other tax free shares is bogof Share Reward you buy one and the company gives you up to two free you just hold them five years and can only invest £125 per month. These are always good value (unless share price truly tanks) and paid my sons upkeep at university. Always invest the full amount
IANAFA. But the rule on saving in your pension still holds.