When these types of semi perm dyes are sold into the UK they have to comply with EU regulations on how long they last unopened and how long they last once opened, and unfortunately BAF Yellow does not last as long as it has to in order to be imported into the UK and to comply with these regulations. Special Effects have confirmed to us that this dye does not last as long as the others in the range and we therefore cannot import it into this country and in turn cannot sell it on our website. All other dyes they make last the required 30 months shelf-life and 12 months once opened without any adverse reactions to the hair (always stir/mix dyes before use if they have been left for long periods of time and keep dye away from heat/extreme cold/sunlight etc when stored)
The following page in the gallery shows all alternative yellows which are available in the UK:
http://www.hairdyegallery.co.uk/Gallery-allcolours.html(There may be others but these are the ones from Special Effects, Manic Panic, Directions, Stargazer and Crazy Colors)