Campanula

Just a quick answer to No 2. Yes aquilegia will seed themselves , and all over the place sometimes too

question 3. put grit round lettuce or broken egg shells, as long as the pellets are round the lettuce and not on them i don't see a problem you are going to wash them well anyway i would think, i dont like slug pellets sometimes birds eat the snails then they get poisned, you could also try beer traps, dig a hole for a jam jar or small bowl put some beer (not lager) in the jar or bowl and the little blighters jump in and die with a smile on their face!!! Don't forget to empty the traps though every morning!

question 3, slug pellets do work, but not recommended around crops also they are very affective at killing slugs but also kill the wild birds that eat the slugs there are allot of alternatives these days if you grow the lettuces in a pot a copper strip around the outside will stop any slugs. also salt is very good, hope this helps

Newkid - sorry but what do you mean by 'blue clips and white clips'? So far as what the leaves should look like it really depends on which campanula you planted.

It's Campanula Carpatica, Moon grower.
Newkid, if you do a search for campanula blue chips on Google images a couple of the pictures show the leaves quite clearly.

Oooooh, please don't use slug pellets (sobs) They are so awful for wildlife, especially hedgehogs. The hedgehogs eat the slugs that have eaten the pellets and die a horrible slow death, hic.

Another alternative, is to mix compost with soil and plant in a pot. The raised area makes it harder for slugs to get to the seedlings. I also don't put seedlings down, I wait til the plant is tougher and less nice for the slugs to eat.

Small, sharp grit is another thing to put round the base of plants. Or soft drink bottles, cut in half. You could pop theses over each area every night and take off during the day.

Another option is to take the torch every night and hand pick off the slugs, then drown them in a bucket with a little water and salt.