Even though BoE hiked interest rates by more than Fed, Fed is still more attractive, and I believe there are more hikes to come from both but for now Fed still pays more in interest.
US economy seems to be performing better than the UK. This week the IMF downgraded the UK, suggesting it will be the only "advanced economy" to contract this year.
I also believe we've just seen a double top, so looking for GU to drop to previous weekly support.