If you were yourself, it'll be fine or better. The UK loves an eccentric more than anything else.
All the TV interviews I've seen with you, you've been compelling whether you were ill, jet-lagged or anything else. I don't think this one will be any different, and if it is, big deal, we've loved you over here for close to 40 years. 7 minutes with J.Ross won't change anyone's opinion.