You've got a lot going on here. Both are lovely subjects but I feel like you are focusing more on the flowers than the castle. I just looked at your gallery btw, you have some lovely work.
This house was on the side of a steep hill...there aren't many angles to shoot from. And I'm sad to say that Canterbury Castle has been torn down. Nobody wanted to buy it and spend the money to repair the mortar. The city was concerned the boulders would start falling and land on the houses below.