Scotland was kinda slow to catch on to vegetarianism I'm veggie 30 years now and when I was first veggie it was a nightmare.
You really should be able to find a good vegetarian soup in most places in Scotland now, not least because soup is our unofficial national dish
My mum as an army wife found it a great ice breaker to make a huge pot of soup when we first moved somewhere and take some round to the neighbours to introduce us.
In the 70's though some people were quite snobbish and looked down on home made soup (era of convenience foods here in Uk)
Haggis normally is a dish made of sheep offal, suet, carrots, onions, oats, spices. It's a sort of large sausage/savoury steamed pudding all that is mixed up with stock, sealed in casing and steamed for hours.
Veggie haggis the meat is replaced by lentils and veggie suet but as I say it's really the spices make it, my mum was sceptical then tried some of mine once and was impressed.
I am proud to be Scots, glad you enjoy visits here, like everywhere there's good and bad parts especially my home town of glasgow but there are seriously impressive good parts and I must admit despite it's tougher areas I do love glasgow of all the cities I've been in. So much to see and do there (normally).
@Weedsnseeds1 As an army brat I've lived all over Uk, it's amazing how within such a small island there's huge regional differences in food and drink and taste palate. I well remember mum used to basically bring a spare suitcase when we came up to visit family as she'd fill it with food and drink from "home" - irn bru, pan loaf, Lorne sausage, white pudding, tattie scones, crusty rolls, tablet, macaroon, creamola foam, and gran would do a flask of soup for us all and cheese sandwiches with strong scottish cheddar and whatever cakes she'd been baking like fly cemetery 
Don't worry op not real flies it's a tray bake base of shortcrust pastry, filling of mixed dried fruit (raisins, currants, sultanas - the "flies") topping of flaky pastry and drizzle of lemon icing.
Or gingerbread squares icing topped and so sweet your teeth were on fire.
The pearl barley really does make a difference but be careful not to use too much, other than that it's the seasoning and again with home made (which many restaurants and cafes do their own to a family recipe) it varies so much.
And i would agree on the bought mixes they tend to be heavy on the cheaper items you're better buying the ingredients separately and finding the proportions you like best.