focus22 - check with the Royal Mail. You should be able to file a "change of address" card and have his mail either kept at the post office or forwarded to H's new address.
That will keep that reminder of him away and make it his responsibility.
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells