Outside an easily commutable distance ( London, Essex, Cambridge, Reading), our consultant is happy to spend nights or the whole week away. We have worked in & for these clients.
The London airports can be reached easily so European cities are possible on a weekly commute basis. Longer periods away would require other arrangements. The distance can affect the fee rate.

The alternative is some or all work done at our premises and some visits to your site. We have an extensive development environment.