In an attempt to stop uncancelled stamps being delivered on packets, and as an alternative to this:
Royal Mail introduced this device, producing this type of cancellation:
Sadly the initial results are not promising. Whilst this is fine
the stamps on this special delivery letter had already been postmarked with the Great Glen Post Office counter datestamp - so there was no need for either Glasgow or Southampton Mail Centre to vandalise them with the new device:
And the some of the stamps are tied to the envelope, so the postmark is quite clear for all to see!