You're lucky as you only have £30 fine. my husband just a quick swerved in bus lane and got fine £65 and has to pay it within 14 days but we live in London. I told him to pay it asap just in case he forgot but he was so pissed off and keep leaving it till he got home 5 pm w/c is the 14 days of the ticket issued and try to pay it and it comes out £130. He get more angry and I hope he learn for his lesson "don't leave it too late" being stubborn is not the answer...