Well, if you actually make the Fuggles addition 1.5oz at 60 minutes and use 1oz Willamette for aroma at 0 minutes, you hit the
10C American Brown Ale exactly.
Again, using 1.5oz Fuggles at 60min, then subbing the other 0.5oz of Fuggles at 0 minutes (instead of Willamette) puts you into the
11C Northern English Brown Ale style, since this style calls for English hops rather than American varieties.
It also qualifies as a
12A Brown Porter (again with 1.5oz Fuggles), but the color is right at the low end for the style, and you'd want to back off on any aroma hop additions (or keep it at Fuggles).
Batch size: 5 gallons (5.35 into the fermenter to account for trub loss)
OG 1.045
FG 1.010
IBUs 25
ABV 4.6%
If you actually did only .5oz Fuggles, your IBUs would be 9, which is going to be nothing but sweet water, totally unbalanced.