MORRIS burials

[lubok]

Hello,

I'm trying to track down the burial (and possible headstone information) of

Archibald Patterson Morris, born 16 Nov 1903 in Wetherby, Yorkshire, died 1987 (possibly February) in Peterborough.
His wife was Martha Mary Morris (nee EDWARDS), born 25 Dec 1915 in Clwyd, died 9 Mar 1994 at the District Hospital, Peterborough. Martha was living at 6 Manor Close, Wittering, Peterborough, at the time of her death.

A daughter is possibly buried with them:
Shirley Irene LEETON, born 5 Aug 1936, died May 1993 in Peterborough, age 56.

Can anybody please help me?

Many thanks,
Rachel, Wellington, N.Z.