People tend to check in during these times:
Best and quickest service due to location
Great staff, great service. Try the iced vanilla latte.
A great place to sit and watch the world go by. But the service is usually shockingly bad, sadly. Costa must train them especially...
Best coffee shop since my brother works here :D
Get a costa card, free and gives you 5% costa cash back.
Worst service in London. Rude and slow
Try the egg and mushroom roll toasted, it's amazing :)
The staff kindly do a hot version for me now...def.a must on a icey cold day
Raspberry iced tea is perfect even if its no longer summer :)