Give me some british 70's prog-rock bands, featuring a flute player.
Sure, here are some British progressive rock bands from the 1970s that featured flute players:

    1. Jethro Tull
    2. Gentle Giant
    3. Ian Anderson
    4. Camel
    5. Traffic
    6. Focus
    7. Gryphon
    8. Fairport Convention

These bands were known for their complex and experimental musical styles, blending elements of rock, classical music, and world music, and incorporating diverse instruments such as the flute.
Any of the bands still active today?
Of the listed bands the following are still actively touring and recording.

Jethro Tull 
  Ian Anderson
Camel
Gryphon
Fairport Convention

What else would you like to know about British progressive rock flutists?