It all seems like a very long time ago now.
There have been two General Elections, two changes of Prime Minister and one hugely divisive nationwide UK referendum since..
It was a time before the pandemic, a time when the word 'Brexit' still meant nothing at all. It was a time when things which now seem fantastic seemed plausible. The Liberal Democrats still seemed like a force to be reckoned with. Some still took UKIP seriously. Many people realistically expected Ed Miliband to be Prime Minister at the end of it all.
The notion that Donald Trump might soon be US president or that the fairly obscure ageing left wing backbencher, Jeremy Corbyn might be elected Labour leader both seemed so far-fetched as to be completely ludicrous.
Prime Minister, David Cameron was so worried about the UKIP threat to the Tories that he promised to hold a UK referendum on EU membership if the Tories won a majority. Nobody expected them to win a majority. In fact, they did: a small one, their first in nearly a quarter century. UKIP only saw one MP elected who soon quit the party anyway. Cameron himself resigned the following year after losing the 2015 referendum. The year after that, his successor, Theresa May lost the majority Cameron had won after calling an entirely unnecessary second General Election.
New MPs elected in 2015 included Boris Johnson for the Tories and Labour's Keir Starmer.
It was a tough election for Labour but a much tougher one for veteran political correspondent, Nick Robinson who was battling a diagnosis of throat cancer.
This is the story of his struggle to cover the 2015 campaign.