Former Cabinet minister Lord Tebbit, whose wife was paralysed in the 1984 Brighton bombing, said:
Personally, I think it is hopeful that Mr McGuinness has decided, presumably on behalf of Sinn Fein, that he should accept the sovereignty of the Queen over Northern Ireland.
I hope it will be followed by some further moves to express repentance for violence that was caused by Sinn Fein-IRA.
The Tory peer added:
We know the views of the people of Northern Ireland. They wish to remain within the UK, so hopefully Martin McGuinness now realises that what went on was violence without a point.