If you are a national of a country outside the EEA, and not sure whether you need a visa to travel to the UK you can check the Home Office website, the rules do change from time to time and will depend on the purpose of your stay.
https://www.gov.uk/check-uk-visa/y
The way UK Visa applications are now being submitted, processed and considered has changed this year. Prior to 28th January 2019, applications from Italy were sent by post and appointments were made at the British Consulate in Rome.
From this year, all UK visa applications are now made exclusively online via the GOV.UK website: https://www.gov.uk/apply-to-come-to-the-uk.
In the country where the applicant is resident, the application will be processed by a TLS Contact Centre. In Italy, TLS Contact Centres have been set up in Rome and Milan where applicants will be required to present their bundle of original documents for inspection by a UK Visas and Immigration (Home Office) caseworker and have their biometrics taken (fingerprints, photograph and signature).
After an applicant has registered, completed the application online, uploaded supporting evidence, paid the relevant visa fee in full, they will then be required to make an appointment at the TLS Contact Centre in Rome or Milan. Following submission of your application and making an appointment you will be given a GWF reference number, which will allow you to submit further queries and supplementary documentation or track the progress of your application.
Please contact Solicitor Aleksandra Broom if you need assistance in making any UK Visa application online e.g. visitor’s visa, student visa, study visa, work visa, family visa, returning resident visa etc. In addition to submitting applications on behalf of clients, we are able to accompany any applicants to their appointments at the TLS Contact Centre in Rome (Piazza dei Siculli 14, 00185).
We would any advise any applicants to start their UK visa application process at least 3 month before their planned arrival to the UK.
