You were speeding and therefore committing the offence , but you have "special reasons" for speeding – a genuine reason why you objectively needed to speed. Brother Officers and other inmates were at risk.

Your best bet is to write to the Scamera partnership with a letter from your Governor explaining the situation and clearly state you are offering special reasons.

See a solicitor. If you want to deal with this yourself you will need a fair bit of knowledge about consumer law and consumer credit law.

If you bought the bike on the HP as opposed to through a loan, you can also refuse to pay the HP company but this can get very complex . It will depend substantially on the small print of the agreement and some eyewateringly complex sections of the Consumer Credit Act. Then the fun really starts.

What you were given was a "Rectification notice". Tell the prosecuting authorities what has happened, in writing and back it up with the police report number of the theft and correspondence with your own insurers.