Santa Claude by Alex T. Smith
Hodder Children's Books
Claude and Sir Bobblysock think they've caught a burglar coming down the chimney on Christmas Eve.
They clap on the handcuffs and turn on the lights. Oh no! It isn't a burglar - it's none other than Santa Claus himself! Now the key for the handcuffs is lost and it's up to our two heroes to deliver all the presents before midnight ...