Looking for Bennett Relatives IN Sydney England

I am looking for relatives of Mr & Mrs Percy & Alice Bennett (maiden name was Laidler before immigrating to Australia) & any relatives of my deceased father Sidney Ernest Bennett (son of Percy & Alice) who lived in Peakhurst, Sydney, Australia. I would also like to find any photos or memorabilia on my father who was a boxer in his late teens/early 20's. He would be 69 this year if still alive. I am the youngest grandchild at 31 & his youngest daughter.