Richard Briers' health deteriorated after being diagnosed with emphysema five years ago.
In an interview at the end of January, he told how he blamed his years of smoking for the condition.
"It's totally my fault. So, I get very breathless, which is a pain in the backside. Trying to get upstairs... oh God, it's ridiculous.
"Of course, when you're bloody nearly 80 it's depressing, because you've had it anyway."
More top news
A major review of students finance has been launched by the government. But how much reform is on the cards?
KFC expects disruption to some restaurants to continue for the rest of the week after chicken shortages across the country.
On Tuesday David Davis made the argument for both the EU and an independent UK to continue to oppose state subsidies of businesses.