UK Visa and Immigration (UKVI) do offer priority visa services which allow you to receive your visa application decision quicker. If you choose this service, your visa application will be placed at the front of the queue once received by a UKVI decision making centre (British mission/UK). The service is optional and to use the service you will need to pay an additional fee.
Important note: This service does not imply or guarantee in any way that by using the priority service you will be successful in your visa application. All visa applicants must meet the requirements of the UK immigration rules.