What is the trend regarding British nationals in Iran in recent years?

In recent years, there have been dozens of arrests of British nationals as well as dual nationals in Iran. These arrests typically occur under vague and security-related charges, creating a pattern of detentions that raises significant concerns for travelers to the country. The consistent nature of these arrests suggests a systematic approach by Iranian authorities, particularly targeting individuals with British citizenship. This trend has prompted warnings from the UK government regarding travel to Iran, highlighting the risks faced by British citizens in the region.