Thanks for the information! This post just come at the right place!
I will be flying BA578 (LHR/VCE) soon and this is my first time travelling on BA. I am OW Sapphire and I'm entitled to enter the lounge.
Any suggestions that which lounge will be better for me? I mainly concern about the dining environment and the choices of food/drinks, but do not really matter about whether the place is quite or not. What should I expect for my breakfast? I would be leaving hotel at 6am and I don't think I can grab a breakfast beforehand. Also, I am just travelling on Euro Traveller but not Club Europe.

Also, can someone tell me that if this flight normally departs at T5A or T5B/C?
Thanks a lot!!