Currently about 1:20 people in London would test positive for covid using a PCR test, maybe half of them are currently infectious. Of course, many of them will realise that they've got it and will be staying home and away from other people. That's still a lot of infectious people wandering around though.
Out of control? I don't know how to answer that. The UK is more or less only looking at hospitalisations and deaths right now, and while neither of those are great, they're not outside the "prepared for/expected" range.
The boosters are doing their jobs. If you're under 70 and don't have a serious underlying condition then your chances of being hospitalised are very low once vaccinated, and extremely low after a booster. If you're worried about it interfering with your work and meaning you get stuck in a hotel room, sleeping yourself better - yep, it could, and the same will be true of the people you're working with.
You can protect yourself further by wearing a N95/FFP2 mask, they do work. But you will need to wear it consistently - which will mean wearing it at work, avoiding eating out in crowded indoor spaces etc. Omicron is hard to dodge if it's in the office or at the dining table with you.