In a word, "Yum!"
Seriously, sounds quite good. But I think you could tweak a thing or two. Your gravity is going to fall around 1.060, IBU ~30, given a median alpha-acid percentage for your hops and using the times you listed.
Balance is going to fall on the malt side of the ledger with a BU:GU ratio of 0.53. English Pale Ales, Bitters and IPAs range from 0.65 to 1.25, so depending on your desired level of bitterness, you may wish to increase the bittering charge or use a hops variety with higher bittering potential.
I also advise waiting to add your aroma charge (which I presume is the purpose of your 15-minute addition) to 5 minutes or, better yet, flameout. That will increase the perceived aromas from your Kent Goldings, one of my favorite hops varieties.