Scotland Under-19 international Theo Archibald has joined Brentford B, signing from Celtic for an undisclosed fee. The 19-year-old completed a medical and will officially join The Bees on 10 June. He has signed a three-year contract but Celtic have allowed him to train with Brentford B this week and he can play in the match against Manchester City at Griffin Park next Monday, 15 May.Theo came through the youth ranks at Celtic, earning himself a professional contract with the Glasgow side. He spent time on loan at Scottish League One side Albion Rovers earlier this year, playing five games for the North Lanarkshire outfit. He has played for Celtic in the UEFA Youth League – which runs alongside the UEFA Champions League and involves the same teams – for the past two seasons. He has made 11 appearances at that level and scored two goals.Theo has earned international recognition for his performances, first being selected to train with Scotland when he was part of the Under-14 group. He played in the Victory Shield when at Under-16 level and made his Under-19 debut earlier this year. He earned two caps at Under-19 level and played for Scotland in the final qualifying rounds for the European Championships in March.Robert Rowan, Brentford FC Head of Football Operations, said: “It’s been an ongoing process for the last few months with Theo and Celtic so I am very happy that we’ve reached this point and secured Theo on a three-year contract. I know Theo well from my previous jobs at Celtic and the Scottish FA. He’s a driven, professional and committed athlete whom over the last few months our staff have got to know better from a personal and football perspective. It is always important that the people we bring to the Club have the right character and personality and will fit well with the group. I like Theo as a young man and know he is the sort of person who fits our ethos.“Theo is an inverted right winger, he’s powerful, quick, direct and intelligent in possession. Our plan is to do some work with him in relation to our style of play in order to fine-tune some areas of his game, particularly off the ball and align him with how we want to play. He has only just turned 19 so there is lots of development to take place over the length of the contract but the staff are looking forward to working with him to improve. He will join up with his team-mates for training on Saturday and will be available to feature against Manchester City. I would like to thank Celtic Football Club for their support and guidance throughout this signing process.”