it's a joke
my mate got the same letter, he goes by reach'n'wash
he doesn't use the wfp man Logo that ironics designed or any logo for that matter. and in no way is that "passing off"
this guys obviously out to protect there 'brand' just like some window cleaners will "threaten" violence against someone canvasing their work.
if he's that bothered about "passing off" he'll go to court. but they know there aint know chance a judge will do anything about reach2wash reach'n'wash or any other kind of reachwash derivitive.
just like coca cola, pepsi cola, panda cola, hell what about rola cola
in lidl the other day they have there own corn flakes, honey nuts flakes, rice crisps, wheatbiscs, :

you get the idea,
you keep going John and put Ebay right if they remove any items.
and ignore this fool