The protest at Oxford's LMS station ended last night as the final protester was dug out from a tunnel.
The eco-warrior, who was in his 30s, was said to be in good spirits despite three days underground in the coffin-sized concrete bunker.
He had been occupying the cramped space since the eviction operation began on Wednesday morning and had been surviving on supplies including a bag of sultanas.
Tunnelling teams had been piping oxygen beneath the ground, to provide him with clean air as they drilled through layers of concrete.
A fellow campaigner said last night: "We haven't had chance to talk to him but he was smiling and waving as he went into the police van. He was in good spirits."
Oxford University spokesman Gill Sanders said: "He has been checked over by a doctor and he was arrested by police.
"As I left they were checking every inch of the building but they do not expect to find anything else. The sheriff will then hand over the site to the University." Two more campaigners, who had been hiding in the rafters, were brought out of the building yesterday morning.
The eviction of protesters from the former London, Midland and Scottish station, which has been occupied by protesters since May, was led by the Under Sheriff of Berkshire, Nick Blandy, who handled the eviction of protesters from the Newbury bypass.
Another 22-year-old campaigner vowed that the battle to save the building was not over.
She said: "We are planning to appeal against the decision to dismantle the building. Our next stage is to try to get a judicial review. Most people are staying in Oxford to see the campaign out."
The building in Park End Street is due to be dismantled and moved to a railway heritage Centre in Quainton, Buckinghamshire, to make way for the new Said Business School and a road widening scheme.
When Oxford University bought the land from Railtrack it inherited the obligation to move the building.
Converted for the new archive on 30 June 2000. Some images and formatting may have been lost in the conversion.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article