Marvellous Fred

 Aux Merveilleux de Fred's London outpost sells these meringue pastries (and flavoured brioche)

Merveilleux are small cakes that consist of a sandwich of two light meringues filled and covered with whipped cream.

New for the Chains

'New' large jaffa cakes at Costa and 'new' meringues at Paul. 

House of Cake and Breakfast

Massive meringues and slabs of nougat cake at Costley & Costley's House of Burns in Kirkoswald, Scotland.  They do an excellent breakfast - latte, wi-fi plus a full cooked plateful - for £6.95: highly recommended.

Modern Meringues

You must have seen giant meringues by now - even Sainsbury's has them.  Forget the two halves with cream, hidden in the chiller, of yesteryear.  Powdered chocolate or raspberry powder can complete the effect.

These examples at Rick Stein's Falmouth Deli.  Huge eye appeal.