| ORGANISATION | LOCATION |
| Adventureline Walking Holidays | Cornwall, Gloucestershire, England |
| Agoy | Italy |
| Alpine Exploratory | Highlands, Cumbria, Yorkshire, Haute Savoie, Savoie, UK, France, Switzerland, Italy, Slovenia |
| Alternative Holidays UK | England |
| Alternative View | Murcia, Spain |
| Alto Sax - Tantra & Naturist Retreat Centre | Essex, England |
| Ard Nahoo | County Leitrim, Ireland |
| Argayall: Place of Light | Canary Islands, Spain |
| Art & Dolce Vita | Italy |
| Art and Yoga Holidays | France and England |
| Auberge Les Liards | Auvergne, France |