http://www.legislation.gov.uk/id/nisr/2019/199

PART 2Formal Assessment of Capacity and Nominated Person

Witnesses and persons unable to sign3.

For the purposes of section 79(2)(b) of the Act a person can only be a witness in relation to the formalities under section 79 of the Act if he or she—

(a)

is unconnected with X; and

(b)

is not X's nominated person.