By all means complain to Amazon as well because their software is dreadful and does need improving. There are many features that get left out for the UK market, but this particular problem was created by the BBC.
I spoke to Amazon today, Josh got Radio 2 working on Echo by getting me to use another skill- myTuner Radio . This will, at least, play Radio 2 (rather than some foreign station). It would extend to playing Radio 2 on multi speaker but Josh did say that he would escalate that to the developers