Late catalogue payments effect on applying for mortgage?!

Onamissiontoreclaim

Firstly I'm a first time poster so please forgive me if I'm posting in wrong forum etc!
I've finally found myself in a position financially to increase our mortgage, ie have paid off credit card,overdraft and two catalogue balances I just have a small amount on a loan left to pay! Now here's the problem, having never checked my credit file until now I stupidly have a late payment showing on one of the catalogues, this is purely due to being unorganised and not setting up a DD! All other credit commitments are paid by DD (and over payments )and on time! I know this is my own fault and believe me have learnt a lesson!
Question is will this likely stop us increasing the mortgage? Currently we have approx £30,000 left on a mortgage and would like to borrow £120,000 to look at houses around £220,000 estimate approx £100,000 deposit from sale of current home!
Also would a broker be best or try through current lender?! Many thanks in advance for any advice!

Thrugelmir

One late payment shouldn't cause an issue.

Onamissiontoreclaim

Thank you that's reassuring! Been reading up on here and appears lenders are getting very strict on these things! I guess there is only one way to find out and end the worrying!