FA Cup final: Who's calling Dan Walker at the top of Wembley?

Dan Walker gets a call at the top of the Wembley arch ahead of the FA Cup final.

But who could it be at such an awkward moment?

Watch Football Focus on Saturday 30 May at 12:15 BST and the FA Cup final live: Arsenal v Aston Villa at 17:15 BST on BBC One and online.

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