Hi.. Can someone please tell me if this is normal.. My 10 mth old lab pup is 15 days into her first season... She was housetrained and has not had an accident for months... However over the last few days she has started weeing on the floor.. But not in one spot she's walking while she wees..... I'm hoping this is season related and not her regressing... Please can someone offer advice

Would get her checked for a urine infection at vets.

Yes, I would say it was season related. Some bitches do wee a bit more during seasons. She is doing a natural thing of letting a potential mate know she is ready...even though she isnt really(being only 10 months old).
Let her out in the garden more often to try & stop her having the accidents in the house.
It wouldnt hurt to get her checked out if you are worried

Some bitches do spread it around when they are in season!!    It's a calling card.   It could also be she's feeling some 'discomfort' from her enlarged vulva which could be sending her mis-messages that she needs to pee.

If you are unduly worried, collect some of her urine and ask your vet to run a urinalysis.   To be sure she's not picked up an infection.   She's 'wide open' when in season after all and only needs to squat in the wrong place.   Which is why, or part of it, I didn't take my bitches off our property when in season.

Spay - in another couple of months?