well done
as for it'll take you forever to save £50k
if you add to the £10k by saving £200 a month, for 5 years
this would give you £26,434,80 @5% interest rate, thats £12k saved and £4,434.80 interest
if you then didn't save anything for another 5 years - but didn't touch the capital, by the time youre 48 you have £33,924 - so £7490 interest (making a total of £11,924 interest 5%)
again if you didn't save anything for 5 years by the time you reach 53, if you haven't touched the capital out have £43,536.66 - another £9,612.66 interest (total interest £21,536 at 5%)
By the time you reached 58 you'd have £55,872 if you got 5% interest rate and didn't touch the capital and didn't add to that particular pot over the age of 43 having save £200 for another 5 years
obviously inflation will have decreased the true value - but the fact is compound interest may take forever to work, but it does work all on its own