Possible Clues:

• Empty tomb
• Church welcomes Irishman, one that's put up memorial
• Silly Eton chap that has a situation in Whitehall
• Note chap that's devious? Whitehall's famous for it
• Hard man or woman, one beginning to climb up monument
• Church gets back on wire to hotel for those fighting types who are late
• Note chap devised for memorial site
• Winding path once leading to memorial
• Opera company hit featuring in church memorial
• Once fallen at the front, troops are praised here