Just wanted to thank you again, phatbeetle and larrabee.
Despite a nasty coughing fit at the interview, they just asked me to come back in for round two on Monday morning. AND I've got an interview for another job (it's actually a job I've done before, but minus the interventional cardiology component) this afternoon.
Now off to buy more Lemsip, my best and dearest friend as I inch back to full health.