Google users will be able to look for information from their personal email accounts on its search engine in a new feature being trialled by the internet giant.

The opt-in trial lets Gmail users see information from their emails – such as flight details and booking confirmations – when they search Google.com.

A Google.com search for "biking in London" would highlight relevant Gmail messages that mention biking in the English capital.

The trial feature is available from Thursday for English-language users with @gmail.com addresses.

Google search boss Amit Singhal said the move was part of plans to build the search engine of the future.

"Sometimes the best answer to your question isn't available on the public web – it may be contained somewhere else, such as in your email," he wrote on Google's official blog.

"We think you shouldn't have to be your own mini-search engine to find the most useful information – it should just work. A search is a search, and we want our results to be truly universal.

"So we're developing a way to find this information for you that's useful and unobtrusive, and we'd love your feedback. Starting today, we're opening up a limited trial where you can sign up to get information from your Gmail right from the search box."

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