J.H.Butcher was (& still is) the UK's top printer of transfers, using methods other than Letraset's dry rub-down technology, which was still patented. How they were legitimately able to print dry rub-down transfers in 1981 is slightly mysterious, not least because while they are clearly 'the real deal' they are also very poor at actually rubbing down, which I know — because I've tried! Possibly this may have been a licensed experiment.
If you think you can detect a theme to these transfers, likely you will conclude as I have that they were probably intended to be handed out to particularly brave (or noisy) children on a visit to the dentist.
Picture Credit: The SPLAT Scan Archives
© Tom Vinelott 2021