Levi
Everybody on ESA is reassessed on a regular basis unless specifically exempted by the DWP, the usual maximum period between interviews for claimants in the SG is three years so it has been five years then you have been very lucky.
There have been a number of updates to ESA since you were last assessed so make sure you make use of our current ESA Claim guides.
www.benefitsandwork.co.uk/help-for-claimants/esa1 You need to complete the ESA50 as if it is a new claim and supply evidence as you can to support what you have written on the form.
Gordon