Some links you may find useful:

Antur Adventure (Welsh Adventures with guys I would trust with my life)

Adventure Works (Worldwide Educational Expedtions)

Jagged Globe (World-leader in the provision of mountaineering expeditions & treks, climbing and skiing courses)

Brecon Beacons National Parks

Llandysul Paddlers

Trinity Saint David, University of Wales

Technical Outdoor Education Support

Morfa Bay Activity Centre