@Thomas2391 No you do not need a new listing. What you need is pro tools which you switch on from your account (not your listing). This then allows you to use rulesets in your calendar to set different min/max rental durations at different times of year.
You do need to bear a few things in mind though:
Any stays over 31 (?) days will not count toward the 105 day FHL letting requirement.
Any stays over a number I can't remember (150 days????) will stop it being an FHL that year
If you charge for utilities etc then you are more likely to create an inadvertent tenancy and you would definitely need an EPC
Hope this helps