Based on the clue 'britains 200 year old rumford medal is given for d...', what is the answer?

Based on the clue 'britain issues this dark postage the worlds first ...', what is the answer? What is associated with: britain might have said put that in your pipe and smoke it after winning the first of these wa… What is associated with: britain signed its first agreement with france to build this in 1875? What is associated with: britain was drawn into the war when this low country was invaded august 4 1914? Based on the clue 'britains 4 pm coffee break', what is the answer? What is associated with: britains beloved queen mum who died in 2002 at age 101 was this queens mum? What is associated with: britains changing rooms gave its designers only around 900 this tlc show goes nuts gives them… Based on the clue 'britains edmund burke called for peace with the co...', what is the answer?