I see you neutralized the hitch lock, but for other readers... you can easily order a replacement here:
https://www.replacementkeys.co.uk/?utm_source=neworder&utm_medium=email&utm_campaign=signature
They just need the 2 digit # on your lock. Not too expensive even with shipping from UK.
https://www.replacementkeys.co.uk/?utm_source=neworder&utm_medium=email&utm_campaign=signature
They just need the 2 digit # on your lock. Not too expensive even with shipping from UK.