David Cameron has admitted he "contemplated having to go" if Scotland voted for independence.
The Prime Minister said he would have been "heartbroken" by the break-up of the UK and considered his position when polls put the Yes campaign ahead just days before the referendum.
Three people have been arrested by police following clashes between pro-union and independence campaigners in Glasgow.
Officers were called to George Square after hundreds of rival supporters gathered in the hours after Scotland voted decisively against leaving the UK.
A spokesperson for Police Scotland said enquiries were underway which could lead to further arrests.
"Three people have been arrested so far in relation to the incident in George Square. Retrospective inquiries will be carried out which may lead to further arrests."
The woman expected to replace Salmond said she will "follow the mood of the people" if promises made in the run up to the vote are not met.
The double Grand Slam winner said he did not regret giving his opinion, but was 'disappointed' at the way he went about it.
Alex Salmond has announced his intention to end a 24-year career at the forefront of Scottish politics. Here is a brief look at his career.