Draining the cooling system

[dmc12@xxxx]

I am going to replace my cooling hoses on my car and wondered which 
is the best way to drain the water from the system should I just 
remove one of the rubber pipes and let the water pour out?

Also (probably best ansered by a UK owner) is there any special 
radiator fluid I should put in when I fill up the system, do I just 
use tap water, how much do I put in do I fill it up to the to ?? and 
which anti freeze would you recomend and where do I get it from i.e. 
Halfords or Partco.....

Regards James