Paul McCartney has delayed the release of his forthcoming new solo album ‘McCartney III’ due to “unforeseeable production delays”.The record is the long-awaited final part of the ‘McCartney’ solo album trilogy, following on from ‘McCartney’ in April 1970 and ‘McCartney II’ in May 1980.After previously setting a December 11 release date, ‘McCartney III’ will now arrive a week later on December 18.“Unforeseeable production delays have forced the release date of Paul’s all-new all-Paul album