The website will give you a good rundown like most BBC food show sites. There are recipes to try and video demonstrations. I also like the glossary. I had forgotten that tandoori meant the oven the food was cooked it.
In the UK, the word tandoori is frequently used to describe food that has been marinated in a spice paste made of ginger, cumin, coriander, paprika, turmeric and cayenne mixed with puréed garlic, puréed ginger, lemon juice, oil and, frequently, yoghurt.
That is also my understanding of the term and how it is used locally.
Speaking of Yoghurt, that's one of the greatest low-fat cream substitutes I've been able to find.
If you're planning on exploring Indian food more closely I recommend you try this page that outlines the essential ingredients. The spices alone should be in every foodie's pantry.