You may be able to come to the UK as a Standard Visitor if you want to visit the UK:
- for leisure, for example on holiday
- for business or to take part in sports of creative events (but cannot partake in un/paid work)
- for another reason, for example to receive private medical treatment.
Note, there are various restrictions on what you can and cannot do as a visitor to the UK. It is important to take appropriate advise if your reasons for visit may be more complex.