Box Ball

Trying to identify something nasty in the buxus. Drawn to inspect 'cotton wool' bits among new growth. When attempting to remove, these appeared to be egg clumps. Then noticed 'cupped' end leaves. As near enough right time of year, I cut off all tender leaves and burned them Then went to the internet and Phyllid seemed the only one that fitted the bill. Anyone know what this could have been and what I should have done?