professionalsnals are a good agency to join up with and you can go onto the nhs site and they advertise jobs so it would be good to give them both a look, they also have hospitals all over the country and what jobs are available I do not have the sites to hand but if you use the English google you should find it.
Hope that helps.
Also you can show how many vacancies there are in your field, you can not work till you have your marriage visa.