FDA national officer Jim Caldwell was interviewed on the Sunday Politics Scotland programme, discussing conflicts between the Scottish and UK central Governments and the upcoming Scottish independence vote.
Responding to comments from First Minister Alex Salmond that other countries have taken just 15 months to complete the independence process, Caldwell said "We really don't see how that is going to be done in that period.
"We may be wrong, it may be that... Westminster says yes to everything, or Holyrood concedes everything. We wait to see, but we believe it's going to be more difficult than perhaps is currently perceived."
The programme was shown twice on Sunday, on BBC One Scotland and the BBC Parliament channel.
Watch the full interview:www.bbc.co.uk/iplayer/episode/b01qfzzz/Sunday_Politics_Scotland_10_02_2013/(44 minutes into the programme)
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