my m-i-l speaks canto with a hakka accent... i sometimes can't understand what she is saying (maybe i just don't want to..>LOL) but when my hubby says exactly the same thing to me in his cantonese accent, i understand...well some of it anyway, i've never taken a lesson...
there actually alot of hakka people in uk, they usually don't mind speaking hakka, I find its hakka people in hk who tends not to speak it (after all it is a course and slightly primatrive dialect)