My CastingCallPro profile,  my IMDb page and my Shooting People card.

The actors union, Equity, has loads of useful info. Bectu is a union for media and entertainment.

CastingCallPro for casting in film and theatre or Mandy, Talent Circle and Shooting People for film production, casting & finding film crew

For London fringe info and meetings, mainly geared towards theatre, take a look at londonfestivalfringe and fringereport