I was stopped by the Police and told that I would receive a Fixed Penalty for speeding. I have in fact now received a Court Summons. Why did I not get a Fixed Penalty?

The option to resolve an offence by way of a Fixed Penalty Notice is at the discretion of the Police. If the Officer stops you, that is the opportunity for the Fixed Penalty to be issued. If it is not issued at the scene, it is extremely unlikely that you will receive a conditional offer as the Police Officer has clearly decided that the matter is too serious to be resolved by way of the Fixed Penalty process. There is no obligation upon the Police to offer a Fixed Penalty and if you leave the scene without a conditional offer in your hand, it is inevitable that a Summons will be issued.