I've already written one letter, giving them until today to pay the outstanding money owed otherwise I will take legal action. i also told them that if they pay by today (and yes, I know the day isn't over yet, i'm covering all bases)then I will enforce the late payment fee, backdated to the date of the letter (this alone currently stands at over £100).
So, assuming hat they don't apy today, do I need to now notify them that I intend to take them to small claims court and if so, is 7 days enoughn notice or does it have to be more - they have already had2 letters and payment should ahve been made on 31st July