I haven't seen the trailer yet, I love Frasiar but my expectations for this are very low. I agree that Freddie would be posh and probably an academic of some kind. He was very indoorsy as a boy with loads of allergies, not remotely strong or fit, not a daring do firefighter type at all. A doctor or lawyer or perhaps a teacher might have been a more believable role for him if they wanted him to have a 'normal' job. I think Lyndhurst is a really strange choice too, i never really rated him as an actor, but then I hated Goodnight Sweetheart, I thought it was dire.