In pic 1 I have to contradict Daisy D. That's a poppy seedling. In pic 2 the frosted furry looking plant in the centre looks like chickweed, a weed. Pic 3 is the chickweed again with possibly borage around it and Oxalis. Pic 4 is another poopy with Oxalis and some sort of rhizomatous grass.(weed) 5 looks like a speedwell (weed) 6 is chickweed again (weed). 7 is speedwell again. 8 could be Sonchus. Here's a simple suggestion. Take a leaf of any you can't identify, scrunch it up and sniff. Several of the plants you list will be scented even at the seedling stage: oregano, thyme, lavender, hyssop, peppermint, spearmint, lemon bergamot (do you mean lemon balm?) I've never grown licorice or savoury so I don't know if they'll have a scent. Yarrow will smell a bit as a mature plant but I've never sniffed a seedling!

I'm thinking the top photos may not be Japanese Honeysuckle. After viewing tons of images of leaves of different strains of it on-line, NONE have as intensely indented heart shape at the base of the leaves as mine. None have leaves that look as thin and soft as these leaves are either. That, plus the fact it hasn't bloomed at all in two seasons with long runners clearly exposed to sunshine above the giant liriope and rose bush nearby, makes me think it is possible something else. Sadly, there's no doubt that the blotchy one is Saw Greenbriar and I'll have to get on that before it gets established. One site said to lay a tarp on the ground to protect other plants from the chemicals and to lay it flat onto the tarp and glyphosate the thing several times over a week or so. But since this one is so young, just one 13" shoot, and has appeared nowhere else in the bed or yard, hopefully it' has not developed a deep, underground root yet. I may try to shovel it up first (liriope and all) and kill that "sucker" in its infancy. I just planted that liriope last year and it should come out easily. :)

Those look like the horse chestnut seedlings I have popping up all over. The squirrels collect the nuts in fall and stash them for future use, However, they forget where they stashed them and the nuts germinate very easily. I have been picking them out of almost every container planting I own!! Found a few in the middle of the lawn as well. Dig down carefully all the way to the base of the stem........you should find a big brown nut. If you get that up, there should be no resprouting.

Only two Heracleum species occur in the British Isles afaik and they are easily distinguished by leaf shape, size and stem colour long before flowering. The jagged leaves and red stem on this one say giant to me.