You can apply Standard visitor visa for the UK for holiday, to meet family and friends, if you are outside from EEA or Switzerland as under APPENDIX V.
Visitor visa is required for all Visa- National Countries before come to any UK Port.
Non-Visa national can come to the UK without prior applying for a visa. Visa will be granted at arrival for up to 6 months.
2 Year/5 Years or 10 Years Multiple entries but cannot stay more than 6 months in one year.
You have to pay different visas fee as per the duration of the visa.