Brexit from Sikorski

I listened to Radek Sikorski, former Polish foreign Minister  peaking on Channel Four news  21st Oct. He said[on Brexit] that strengths and bargaining positions are being tested; that in his view the Irish border question was insoluble; that it was a British illusion that anyone else, anywhere, was interesedt in internal UK politics;; that 'key figures 'among UK government reps had now understood that there is a difference between the  Customs Union and the Internal Market; and he equated  Downing street  with Central Casting-ouch!; I feel more and more embarrassed and ashamed