Yoga websites I would recommend are:
www.iyengaryoga.org.uk – the official Iyengar yoga UK website detailing yoga teachers in your local area.
www.bksiyengar.com - Sri B.K.S. Iyengar website
www.neliyi.org.uk - the North East London Iyengar Yoga Institute
www.yogamatters.com – Yoga Matters is the best online store for all yoga equipment.