Bikes on Trains

This morning: “Good morning Ladies & Gentlemen, this is your on-board steward. Due to the number of bicycles on this morning’s train I am unable to pass through the train.”

This is the South West Trains’ 06.15 from Portsmouth Harbour, arriving at London Waterloo at 07.56, so it’s very definitely a commuter train. Haslemere and beyond is standing-room only.

I have two questions, and this isn’t a cyclist-bashing post. I genuinely would like to know the answers:

1) I thought bikes were discouraged, if not banned from peak-hour trains into London?

2) How much extra do cyclists have to pay to carry their bikes on the train?