Mine is cheese, beetroot and onion in nice fresh bread… white, brown it doesn't matter.

Just had my fav this morning

black pudding & runny fried egg on soft white

You can never go far wrong with salt beef/pastrami, pickles, mayo and mustard (american style); sometimes a few leaves on top too.

Bacon (no tomato sauce though).

B.L.T. although the local sandwich places does a nice seared chicken and green pepper with peri peri.

another vote for salt beef, pickles and mustard

Fish finger.

Ham or chicken, lettuce and mayonaise – followed closely by BLT, Bacon sannger or sausage sanger with tommy K 🙂

Oh Edit: Cheese and Onion made the night before in fresh white bread 🙂 Yum Yum – Damn I am hungry now 🙁

Pork sausage, crumbly Lancashire cheese (has to be Lancashire, everything else is just wrong) and brown sauce. MNOMM, MNOMM, MNOMM

Not exactly a sandwich, but a mate of mine loves taking Weetabix and spreading with butter and jam; eats it just like that! Beyond weird if you ask me.

Pale unsalted butter, good quality ham, thinly sliced gruyere cheese and mustard, in a crispy baguette.

AM – Slightly crispy bacon, with a fried egg (runny yolk, cooked white) in betweentwo lumps of crusty home made white bread. Smattering of mustard, Colemans of course.

PM – Artichoke hearts, Wiltshire ham, houmous, sliced tomato, black pepper between two slices of crusty, home made mixed grain bread.

Late PM after many beers – Chicken 'bab. Chilliandgarlicsossboss, no salad.

Minogue sisters. I'm the filling.

yeah, Beyonce & Shakira please

Depends on the situation. If it's an outdoors, lunch-break sandwich, then the only correct filling is peanut butter and honey.

Bacon and fried egg in granary. Either brown or tomato sauce depending on what's available.

chicken , brie in a seeded wrap stuck in the george foreman till cheese melts :d

BLT
stilton, pickled beetroot and horseradish
cheese and mango chutney

Mars bar sliced into small pieces put on breville sandwich grill, pure love,

Rice pudding cold on a butty is nice,

cheese and onion. Gert big doorsteps of granary.

or, chorizo and peppadews.

Wrap with chorizo, brie, grape and a dab of mayo.

BTW, as weird as it sounds, marmite and peanut butter on toast rocks too.

Brie and red apple in a double decker (three slices of bread) for me

I like CFH's ruling, it's time dependent:

breakfast = bacon and fried egg bap with mayo
lunch = ham on granary with lettuce, cucumber and tomato with mayo
tea = fish fingers on a big bap with cheese, cucumber, fried egg with mayo

you can't have a sandwich without mayo

Either:

Streaky Bacon, Peanut Butter & Apricot Conserve on toasted, buttered Baguette (this is the sandwich that killed Elvis)

or

Ham, Brie, Onion, Mustard & Mayo in a Croissant

Avocado and bacon. Avo needs to be mushy-ripe, bacon really crispy, mayo, black pepper, served on a white sub. Lush.

meat pie tho i do like bacon and brie together

It's simply just bacon and ketchup.