Wessex Archaeology (https://www.wessexarch.co.uk/) provide Terrestrial Geophysical surveys (https://www.wessexarch.co.uk/archaeological-services/geophysical-survey-terrestrial) and Marine geophysical data assessment (https://www.wessexarch.co.uk/archaeological-services/geophysical-survey-marine) in the UK. Also in continental Europe via the sister company, Trident Archäologie (https://trident.eu.com/en/). Full disclosure, I work in the Marine Services team at Wessex!