Do you know what BHP the engine is? As a general rule the 110s usually have DPF (and a dual mass flywheel clutch), the 90s don't.
If you can get the last 8 digits of the VIN I can check online with Peugeot.
Thank you for your help. We're probably going down to see it in the next couple of days (if it stops raining) Ill take a note of the VIN.
Cheers, Mark