Be careful if you are on a GVA Light fare as these do not include any skis/snowboards.

If you are on a GVA Flex fare, then it is included plus the normal bag and as a Star Gold member you could also take another bag.

Also a word of caution for your friend arriving at the last minute, as LHR is in the process of extending a conformance time to all terminals (though not sure if they will bother to install it at Terminal 1), which means you can arrive late but not at the last minute as security will not let you through after a specific time (for example at Terminal 5 it is 35 minutes).