Good luck! All DH's family suffer from asthma and eczema (DH worst of all now) and I was relieved that none of our 3 DDs suffer although one gets a little now and again, next has rosacea and youngest has 2 bad patches of psoriasis fortunately under her fringe and on a leg.
I would counsel strongly against Chinese herbs after horrror stories about liver damage a few years ago, echo what others have said about dairy (even in breastfeeding mothers - our 1/2 Chinese niece got it when her mother ate dairy produce)) and also warn against the too ready prescription of steroids by doctors.
Almond oil makes an excellent moisturiser and sleepsuits with mitts to prevent scratching (BIL had to be bandaged head to toe with tar paste as a baby 60 years ago - so at least we have moved on) Use Aqueous cream instead of soap, and while Johnston's baby shampoo was ok, avoid their all-in-one bath care - it is very much a case of trial and error and also one product which does not exacerbate it this month, may do so next!
I do hope you get all the help you need from Leeds General - there are also good support groups if you haven't already googled and found them.