Hello Leena,
Welcome to IL.
The procedure to come to London for highly skilled workers is to apply for Tier 1 visa.Below is the link to provide you with more information
UK Border Agency | Highly skilled workers
One of the most popular job sites here is
Jobsite UK - 1000s UK Jobs, Start your Recruitment Job Search Now
Type in physiotherapy in the search box and you will be routed to list of jobs in that category.You will also be provided links to other sites which match your search criteria.
Hope this information is beneficial to you.
Have a nice time in IL and take care.