Here is your answer, the red flowers are actually poppies and they are ceramic
Poppies are a symbol of remembrance in the UK. Nearly 30,000 ceramic poppies are on display at the Tower of London to mark 80 years since the end of World War Two in Europe. The red poppies have been positioned to resemble a cascading "wound" at the heart of the Norman fortress, which was bombed during the war.
About spending on defence, I too feel it's wrong to prioritize it while some citizens suffer in poverty. The money should instead go to social welfare to upgrade and dignify citizens lives.
As always thank you for stopping by, do keep enjoying your week and stay blessed :}