Just flown back from SIN. SIN-DOH-OSL with Qatar then OSL to LHR BA separate PNR all in C. In Singapore the very pleasant check in agent said that he could check our bags all the way through and always used to do it but has now been told is not allowed to. I queried why they called the alliance "Oneworld" as clearly the airlines in it are not at all at one. He agreed with a grin and checked the bags all the way through.....