I bought EFKE Adox branded films in the 70's and early 80's but then the UK importer changed and they were later sold as Jessop's own brand films.
I have an article from Amateur Photographer dated June 1978 which shows the film being sold under the EFKE Adox name, and made by Fotokemica, Zagreb, under licence from Du Pont, Fotowerke.
As far as I remember the Du Pont licence allowed Fotokemica (EFKE) the use of the name Adox for the emulsions, and that ceased when the licence expired. Certainly they were advertised as Adox films, and always carried the Dupont licence. It was Dupont who let the trade name lapse allowing Fotoimpex and others to register the name years later..
In BJP Almanacs from the 60's Adox film & paper was imported and distributed by Luminos, and I think that may be linked to the later sale of Adox papers under the Luminos brand name in the US.
Ian