Yes bringing a friend or family member along with you is allowed. This will help some players cope with the stresses around meeting a stranger but additionally, if you struggle to keep score, you can have someone on-site to help you with this.
Any guest brought to the match cannot interfere with the game of tennis, and must only be there for support. Unless helping with scoring, any guests must stay off court and not interfere with the tennis. If you need someone to help you keep score, they can stand courtside, but you must let your opponent know in advance (when arranging your match). The opponent does have the right to request approval from the LTA. The person keeping score should only shout out the score, they should not interfere with calling lines or any other on court matters.
If any issues arise, please contact us here and we can help with any disputes.