Volary,
Just seen your post which no one else has answered yet.
Staff travel is BA's weak point - it is not as good as that offered by other airlines.
No "free" tickets until you have worked in the company for 7 years.
However, you do get access to 'Standby'/ID90s after 6 months.
As I'm single I can only offer my immediate family (3 other people) ID90s. BA don't have 'buddy passes' or other such tickets for friends - a shame!
What they offer instead is a 'Hotline' ticket (20 per year) which an employee can offer to anyone - these are supposed to be discounted tickets but very often they can be more expensive than normal tickets...
Perhaps someone else can discuss tickets for partners etc.