Too early if you ask me , by giving them nesting material and pans too early , you just encourage them to go down early . This generally leads to clear eggs ,I tend to look at the birds in there natural state , for eg if I'm keeping bullies I put pans and nesting material in once the bullies in the wild are building . I think it is easy to get carried away at the beginning of the season and become impatient ,just my opinion .good luck to all of you trying British ,hope you have a successful season .