Can't see anything that fits.
Presume this is your 1991 death - age and location not a match
Leo Wilson
Death Age: 76
Birth Date: 24 Jan 1915
Registration Date: Jul 1991 [probate register say 2 July]
Wrexham Maelor Vol 24, p814
there's this - location right but date of birth and death not right, althuogh near, and a matching birth reg in Belfast
Leo Alphonsus Wilson
Death Age: 90
Birth Date: 11 Mar 1905
May 1995 Swansea
Register Number: C112
District and Subdistrict: 8971C
Entry Number: 11
A few other Leo Wilson deaths, but nothing in the right birth and death range