A
I'm afraid this is not something that we can advise on, these are decisions that only you can make.
I would put your information into one of the online benefit calculators to get a better appreciation of what you might receive under UC, it won't necessarily be less, but it is paid monthly and there is a waiting period.
www.gov.uk/benefits-calculators The biggest issue will be if you are receiving any Premiums as part of your ESA, especially the Severe Disability Premium, as these are not payable under UC!Gordon