There are a couple of issues to consider. There tends to be 2 school's of thought. The first is - I accept a child in to my home as my own and will not take any respite as this may also be damaging to them.
The other is the need for a break.
I agree with both views but this is about individuals for both carers and children. Respite is a standard across most LA's and agencies but I know that some are more reluctant than others.
As a Registered Manager of an IFA, I think carers should take respite if appropriate. It can serve many benefits - a re-charge of batteries, time with your own children/partner, a break which means not breaking down a placement ect.
However, I have been over ruled by LA's on this decision making if they think it may be detrimental to a child. There is a balance here, as in the long term it could all break down anyway.
Carers who do not take a break - it is admirable. However, fostering is draining and the issues some young people come with and their associated behaviours can in the long run be damaging to carers and their own families.
So, in short, I think this is very individual based on the needs of the child and the carers. However, it should never be an outright no to Respite as this is short sighted.