Retired teacher Henry Page from Brighton is at St Paul's with a protest banner.
The 61-year-old said:
The reason I have come today is because £10 million in the current economic climate is inappropriate when people can't afford to pay their bills.
If the cost of this were acceptable, we would know what that cost is. But we don't.
[Clement] Attlee did not get a state funeral or a ceremonial funeral. He was the prime minister who founded the NHS, he was Churchill's deputy prime minister in the national government.
It almost begs the question: is it only Tories that get a state or ceremonial funeral?
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The Sherlock actor made the comment while he received an award for his humanitarian work.