default email signature

Not 100% sure but I believe the signature is in the email until you set the .body property, which overwrites.. so try this:

With CreateObject("Outlook.Application").CreateItem(0)
                    .display
                    signature = .Body
                    .To = Sheets("Data").Range("B122").Value
                    .Subject = title
                    .Body = "Please confirm the outcome for" & Chr(13) & _
                    Chr(13) & _
                    "Surname - " & Sheets("Data").Range("B4").Value & Chr(13) & _
                    "Forenames - " & Sheets("Data").Range("B124").Value & Chr(13) & _
                    "Date of Birth - " & Sheets("Data").Range("B10").Value & Chr(13) & signature & _
                     .Display