Pictures of SAS soldiers abseiling down the walls of the Iranian Embassy moments before they rescued hostages inside have become synonymous with the regiment. But ahead of Tuesday’s 40th anniversary of the assault, which made the elite regiment a household name, rarely seen images of a different part of the daring mission have emerged – and nor was that without its own intense drama. Our pictures show the 19 freed hostages being funnelled through the smoke out of the embassy in central London and into the safety of a holding area in the garden of the building next door.