Can a Section 42 be assigned twice?

Hi everyone

Does anyone know whether a section 42 can be assigned twice? What I would like to do is outlined below:
1)The leaseholder has passed away and her executor has served a Section 42.
2) I buy the flat and on completion, I am assigned the benefit of this Section 42.
3) I renovate the property.
4) I sell the property assigning the benefit of the Section 42 to the new buyer.

In other words I wouldn't be extending the lease myself but passing the benefit of the section 42 on.

Thanks

Steve