Place toffees in a food processor. Process to fine crumbs. Follow step 1 of Basic truffle recipe (see related recipe), replacing dark chocolate with 200g milk chocolate. Stir toffee through chocolate mixture.
Follow step 2 of Basic truffle recipe (see related recipe). Freeze until firm.
Follow step 3 of Peppermint truffles recipe (see related recipe), replacing dark chocolate with milk chocolate.
Follow step 4 of Peppermint truffles recipe (see related recipe), replacing white chocolate with dark chocolate.