but remember, this advice is only good till June. Then armillatox will
be BANNED by the EU, and so will RoseClear2.

What is your source for this? I can find no references on the web.
http://www.armillatox.co.uk makes no mention of this. I find the above
strange as it has only just been given clearance for control of the detested
vine weevil.

If the above should come to pass then Jeyes Fluid is a similar
beastie and in very dilute form is an absolute ace at controlling rose
mildew and black spot. So that's Roseclear covered as well. Basically
anything based on phenolic compounds will kill off the offending pathogens
and allow the rose to be planted. Armillatox is only one such.
A lot of "banned chemicals" are only banned for garden use and are
simply withdrawn by the suppliers so that they become unavailable in the
shops. They remain available to "the trade". Friendly nurserymen could
always give you some.
The caveat here is to know what you need to do to control something
and then apply the most efficacious medium to achieve the result. If you
don't know just ask.