Oyster Barrier Tailgating

Hoping some forum legal minds can help me.

Recently I've been greatly increasing my knowledge of Train revenue enforcement models from the underground to the national rail system.

On one my research trips, I became parted from my ticket and was unable to present it to a Revenue enforcement officer and his police praetorian guard.

I agreed that such misscare with my ticket deserved punishment and agreed to intimidate restitution in the form of a £20 note.
(I have receipts of the payment)

However I now received a court summons for the same offense, likely to incur further cost and criminal record if found guilty (which ive already admitted to)

I feel this is abuse of process but not sure if their any precedent I could use
http://www.cps.gov.uk/legal/a_to_c/abuse_of_process/

(wow did i really start this awesome thread three years ago!)

Have you read and understood the process?