From your previous post you are receiving Contribution Based ESA with an Income Related ESA top-up.
Whilst you are receiving ESA(IR) you are entitled to free prescriptions and Dental Care, you may also receive a discount on eye care. You may also be entitled to Housing Benefit, Council Tax Assistance and help with a mortgage.
If you were to only receive ESA(CB) then you would not be entitled to any of the above and obviously the extra money would not be payable.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems