Hi Harriet, I also live in the UK and have found that http://www.faithinnature.co.uk/ do a nice rosemary shampoo maybe worth a try ?
updated by @justin-cross: 07/09/15 10:45:44PM
Hi Harriet, I also live in the UK and have found that http://www.faithinnature.co.uk/ do a nice rosemary shampoo maybe worth a try ?