Recommend a protein supplement?

Interested to read this tread, I like most cycle daily and for leisure, I also go to the gym 3 - 4 days a week, 2 days I do Gung Fu training, and try do 2 days weights. Started the Gung Fu in Jan, since then I have dropped a stone in weight, and am currently about 9.5 and 5' 9", would taking a protien shake make a difference, I am thinking I might be too thin, but eat plenty. Not very clued up on supplements etc?

You shouldnt need any supplementation if you are eating properly. Focus on getting enough calories from good quality food. Your weight suggests you are incredibly skinny. Carbs are great for weight gain, eat a load of pasta/rice ideally after exercise as large carby meals will make you tired. Get good fats in you from dairy, red meat, fish, palm or olive oil. Saturated fats are necessary for testosterone which will in turn help you build muscle.