**Question 1:** What did Keir Starmer label the claims regarding the use of Lord Alli's flat?
**Answer:** Keir Starmer branded the claims as 'farcical'.
**Question 2:** Who is facing questions about the use of the flat for filming?
**Answer:** The Prime Minister is facing questions regarding the use of Labour peer Lord Alli's flat for filming during the pandemic.
**Question 3:** What was the context in which the flat was used?
**Answer:** The flat was used for filming during the pandemic.
**Question 4:** Who is Lord Alli in relation to the Labour Party?
**Answer:** Lord Alli is a Labour peer, which means he is a member of the House of Lords representing the Labour Party.
**Question 5:** What implications could the claims have for the Prime Minister?
**Answer:** The claims could raise questions about transparency and the appropriateness of using a donor's property for political activities, potentially affecting public perception and trust.