Yes, I thought that as well.
When the last series was on three years ago, she was much fuller in the face, so perhaps weight loss or as you say JP, smoking, has made her look older.
Possibly a mixture (trying, like you, to be fair and see this from all sides/possibilities) but the way smoking ages skin is shocking and is surely the habit easiest avoided to 'be on the safe side'? I know genes have a lot to do with it - my Mum looks at least 15 years younger than her 75 years, her Dad looked about 75 when he died at 93, and apparently (other people's opinion, not mine!) I look far younger than my 45 years... but at the same time none of us are/were smokers, and I think it does have an impact on how the skin ages, no matter what the defenders of the habit might say! It is a shame if Honeysuckle feels the pressure to stay slim and has gone down the smoking route as part of that, but maybe she genuine just enjoys being a walking ash tray if the chain smoking aspect is true?