Well you'll find out soon enough with a letter from the Police. If its your first time speeding don't worry, you'll pay £60 and attend a speeding awareness course where you sit and basically watch speeding prevention videos with other convicted speeders. If it's your second time speeding... £100 and 3 points on your license, which if your a young driver could increase your insurance highly. But I hope you was lucky - normally you can spot the flash so if you didn't you probably didn't get ticketed.