Roll over relief and Entrepreneur's relief

Dear Tutor,

I understand that an Entrepreneur’s relief is available on disposal of part or the entire business whereas rollover relief will be on disposal of individual asset. Hence, the Entrepreneur’s relief would normally not be available when the rollover/ holdover is claimed as it pertains to an individual asset.
However, if the entire business is sold then we will have Entrepreneur’s relief available on the gain other than that on which Rollover or holdover relief has been claimed.
But what happens in case of sell of the part of business i.e. will we have Entrepreneur’s relief as above if we have claimed rollover or holdover relief?