UK Visitor Visa Guide & Assessment:

United Kingdom offers an extremely elaborate and vast range of tourist and short stay visas. The visas range from general to profession and family visit specific visas.
General Visitor Visa

This visa can be applied for a minimum time of 6 months up to 10 years. The fee for general visa is £83 while the fee for long term visa for 1, 2, 5 and 10 years is £300, £300, £544, £737 respectively. The visa can be applied for a recreational or holiday trip, at friends and family or for organ donation to family or friend.
Business Visitor Visa
The three kinds of business visitor visas; business visitor, Academic visitor and Doctors and dentists visa can be applied under this category, if the visit is marked with a short stay pertaining to your employment.

Child Visitor Visa
The child visitor visa is for persons under 18 years if age. The visa duration is from 6 months to 12 months, while a long term visa can also be applied for.
Entertainer Visitor Visa
If you are an entertainer and cannot qualify for the British Citizenship then you can apply for the Entertainer visitor visa.
Family Visitor Visa
With a fee of £83 you can apply for a family visitor visa for visiting family in the UK.
Sports Visitor Visa
The visa can be applied for if the nature of your visit is related to a specific sport, and you are either staff or official of the event.
The long term visa duration and fee is the same for all above mentioned categories, as well as the condition of being not a part of EEA and Switzerland.
Marriage Visitor Visa
With a fee of £83 you can apply for this visa. You can request the visa if, you want to undertake or give notice of a marital relationship, or intend to settle as a result of such a relationship in the UK.
Parent of a Child at School Visa
If your child attends a private school for which he pays fees, and you do not belong to the EEA and Switzerland, then you can apply for this visa. The visa is granted for six months with a 12 month extension every time.
Permitted Paid Engagement
With a fee of £83 you can apply for this visa if, you do not wish to be sponsored through the points-based system and want to do work that is paid. You should not be from EEA and Switzerland.
Private Medical Treatment Visitor Visa
If you are not from EEA and Switzerland and want to undergo private medical treatment, then for a fee of £83 for 6 months and £289 for 11 months, you can apply for this visa.
Prospective Entrepreneur Visa
For a fee of £83 for a maximum of 6 months, you can apply for this visa, if you are not from the EEA and Switzerland, and want to come to UK with regards to financial or physical takeover of a business.
Chinese Tour Group
A minimum of 5 person’s group can visit the UK for a maximum of 30 days, with the tour being organized by any ADS licensed Chinese tour operator.