Alex
It depends on what work you are doing. If it is just working in an office then most will cover your trip under a standard policy. Please note however that most policies will exclude any form of manual labour.
My advice is to phone companies to provide full information of your work and they will advise whether they can cover and if so the premium that applies.
If the company you work for uses a local Insurance broker, this may be a good option as they can shop around for you, for a suitable policy.
Huckster