Possible Clues:

• Prime minister as roof-worker
• Yon American singer was once the No.2 female in UK?
• Traditional roof maker
• Baroness —, former PM
• Roofer leaves small opening in both ends of the roof, to start with
• British PM
• Worker on ladder so dear to Robespierre?
• One covers up for Tory leader …
• Is that Her Ladyship doing the grass about a century?
• Church gets dire threat about man on roof