I have just booked a round trip from London to Australia with stopovers in Singapore and HK. The Melbourne to Hong Kong leg is on a Cathay plane with BA codeshare.

I can't book seats on that leg. Presumably this is something to do with it being a Cathay-run flight ... is this normal ?

nb - I suppose I have been spoiled by BA allowances but the Cathay business class luggage allowance at 30kg/passenger seems rather small in comparison to the BA allowance.

Presumably my BAEC gold (my wife is Silver) will bump us up to something that is more in line ?

Apart from these minor glitches, we are looking forward to flying Cathay again. I think it has been over 20 years since we last did ... they bumped us to 1st class that time. Here's hoping ....