United Kingdom, United Kingdom
If you have internet on your mobile, then download some apps for navigation and maps. Google or Apple maps now can show public transport, but Citymapper is more advanced in this and also has offline tube and rail maps.

Travel, chat,

Are you planning
a trip?

Select time and place and
find other travellers who will be there

You are travelling and looking for new friends?

Choose a language and see
who is travelling nearby

Have you got the tickets?

Check in your trip (date and destination)
so other travellers can message you