Hi Kaylene,
Christine's info is spot on. Here are the details of the events so you can order the certificates from the GRO...
BIRTH...
Name: SPARE, Arthur S
Registration district: Okehampton
County: Devon
Year of registration: 1927
Quarter of registration: Jul-Aug-Sep
Mother's maiden name: Tucker
Volume no: 5B
Page no: 490
MARRIAGE...
Groom: SPARE, Arthur S
Bride: RICHARDS, Jean K
Registration district: Okehampton
County: Devon
Year of registration: 1948
Quarter of registration: Jan-Feb-Mar
Volume no: 7A
Page no: 1204
WIFE'S BIRTH...
Name: RICHARDS, Jean K
Registration district: Okehampton
County: Devon
Year of registration: 1927
Quarter of registration: Jul-Aug-Sep
Mother's maiden name: Weaver
Volume no: 5B
Page no: 489
CHILD'S BIRTH...
Name: SPARE, Richard S
Registration district: Okehampton
County: Devon
Year of registration: 1949
Quarter of registration: Apr-May-Jun
Mother's maiden name: Richards
Volume no: 7A
Page no: 639
DEATH...
Name: SPARE, Arthur S
Registration district: Exeter
County: Devon
Year of registration: 1951
Quarter of registration: Jul-Aug-Sep
Age at death:24
Volume no: 7A
Page no: 348
PARENTS' MARRIAGE...
Groom: SPARE, Samuel
Bride: MILFORD, Lily
Registration district: Okehampton
County: Devon
Year of registration: 1927
Quarter of registration: Jan-Feb-Mar
Volume no: 5B
Page no: 617
(no sibling births found)
Good luck, Mark.