Please could you help identify this plant in my picture. I hope you dont mind if its really obvious, as I am a gardening novice. I have cut it back but it seems to grow back at a very fast rate and is getting very big, is it going to have nice flowers, please could you give me the name so I can google it!

Thanks for your help
keep trying to upload my pic by clicking manage attachments and get upload failed, dont know why??? it is only 74kb and jpeg format please could you help with this too sorry! it does say I may post attachments