Jennifer,
Here is the YouGov data:
Sample Size: 1619 GB Adults Fieldwork: 4th - 5th June 2018
Q: Headline Voting Intention:
Con: 29-29 May: 42, 4-5 June: 44, up 2
Labour: 29-29 May: 39, 4-5 June: 37, down 2
LibDems: 29-29 May: 9, 4-5 June: 8, down 1
Don't read too much into it, one person...