There are many sites on the internet relating to Ninjutsu and the Bujinkan - some are better than others!
If you would like more information you could try:
A webpage maintained for soke Masaaki Hatsum.
Ben Jones's webpage - bujinkan news and translation services.
The Warrior Information Network - lots of information, although more US than UK.
For information about training / staying in Japan:
George's site with Hombu and Ayase class schedules plus other news.
A site to book hotels in Japan (including the Noda Tobu Hotel).
The Hanata Guest House - always popular with Bujinkan students.
Other people we have trained with:
Dave Carroll's dojo in Dublin (also at University College Dublin).
Sandy Marwick's group in Hemel Hempstead.
Tim's dojo and Tombo supplies site.
Can supply an excellent, heavy weight gi.
Have a large range of high quality wooden weapons and other equipment.
Authentic reproduction Samurai armor.
Have a large range of katana and wakizashi.