Yes, first one's Creeping Buttercup and the second one is one of the many Hawkbits or Hawkweed - can't tell which one without close examination - there are many and they're all quite similar.
Both plants are weeds - Creeping Buttercup is quite invasive and the Hawkbit-type plant will spread all over your garden by seeds like smaller dandelion clocks. I'd pull them up if I were you, unless you're very fond of them.
“I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh
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First one, looks like creeping buttercup.
Yes, first one's Creeping Buttercup and the second one is one of the many Hawkbits or Hawkweed - can't tell which one without close examination - there are many and they're all quite similar.
Both plants are weeds - Creeping Buttercup is quite invasive and the Hawkbit-type plant will spread all over your garden by seeds like smaller dandelion clocks. I'd pull them up if I were you, unless you're very fond of them.