Ok so what do we think ladies , is this just a shadow on my babies head or lots of lovely hair ?! My mum thinks it is hair , she said the side of her he'd looks 'patterned' like it has hair

!!
It looks like hair because of the pattern like your mom said. However, it does depend on a few things. When we asked the tech during the u/s, she dismissed our suggestions that what we were seeing was hair because he was also near the placenta and she claimed that what we were seeing was the shadow of the placenta

really, it's just going to be a guessing game until baby gets here. My advice would be to let it be a wonderful surprise. It was a lot of fun in the delivery room when the doctor checked me and said he had a lot of hair. We took bets on how much hair he would have and we were all shocked when he came out with as much as he did.
It never fell out either BTW, he is 6 months now and still has a full head of hair except for a tiny bit of a bald spot in the back where he lays on it a lot.