Why A&E locums specifically? Tbh I think there are enough people wanting to avoid A&E (though I think it's hugely valuable) that if you rank enough programmes including it, you're likely to get one. And if not, there are staff grade jobs or you may be able to.locum in trusts you've already worked in - this is easier than general agency locums as at least you're familiar with the site/systems even if the specialty is new.