Hi Robin
Please go into your records and change your forum name. At the moment your email address is showing and this is open for anyone to see on the internet. Follow the link on how to do this
benefitsandwork.co.uk/guides-for-claimants/faq/forum As IB ESA is a means tested benefit, claiming HB would not affect your IB ESA.
Unless you are living in supported accommodation with a care plan then you will not be able to claim housing benefit as a new claimant, you would have to claim UC and the Housing Element, but if you claimed UC then you would loose your IR ESA and ESA premiums.
Gary