Yes. Start by registering your individual details through the main page. When you are complete the account opening select investing by a company. Then enter information on the company to register that organisation. The individual user is then the administrator of the company page.
We shall require certain documentation that for UK companies can be found at https://beta.companieshouse.gov.uk.
The free companies house “current appointments report” is useful to download that contains a lot of the current information for registering your account. This can be accessed via Web Check on companies house – http://wck2.companieshouse.gov.uk//wcframe?name=accessCompanyInfo. Search for the company, add a report to basket, create a free account and download the report from the download centre. The Current Appointments Report contains general company register information, details of previous names recorded over 20 years, key filing dates, company status details, company officers (excluding business occupation) and recent filing history.