Welcome to the board!!
You can take more than two pieces. Hubby and I always bring our big luggage and check it, and the largest "legal" size carry EMPTY when we cross the pond (the other direction). We have to bring bag tons of tea (PG Tips), and husband just adores Twiglets so a few bags of those, and as much Stilton, Shropshire, and Stinky Bishop as we can manage. Wish customs would allow us to bring meat pies and bangers back. I miss bangers and mash!!