I brought it up due to the banter I used to have with an old workmate (a guy from Bristol who was a Rovers supporter and had Liverpool as his second team). We would often argue about which goalie was the better and (without any bias for his team) I always thought Shilton was the better of those two exceptional keepers. I also thought that Seaman and those two were the best I have seen in goals for England.
Shilton held the record for the number of caps for a long long time and if either he or Clements had been chosen consistently one of them would still have that record.
England were certainly blessed with keepers you could call world class at that time and as someone else mentioned Joe Corrigan was no mug either. Best England keeper I ever saw was slightly before then though, had to be Gordon Banks.