Upvote:2
The standard way to check this is to use the UK governmentβs check if you need a visa page.
In your case it tells us that you need a visa.
Notes:
According to https://www.gov.uk/guidance/visa-decision-waiting-times-applications-outside-the-uk the regular waiting time is about 3 weeks, but currently stands at around 6 weeks. There may be expedited services (priority in 5 days, super priority the next day). In Norway there seems to be priority service (limited availability, 300 EUR additional cost) but no super-priority.