Reserve Training

Reserve Soldier

Basic Training consists of two main courses and some online training packages. You can book on the courses to fit around your daily life, so it could take you several months to finish your basic training.
Module 1: Foundation Training. 5 alternate weekends, or 9 days consolidated, at an Army Training unit with other Army Reserve Recruits.
Module 2: Battle Camp. A 15.5 day full residential camp for all recruits.
This completes your basic training, from here you will attend your trade training depending on the role you wish to do. For Infantry it would be the 2 week Combat Infantry Course.
You can find out more about basic training here.

Reserve Officer

You can complete your officer training in modules or in one go depending on your circumstances. Both options will see you receive your commission on completion of your training at The Royal Military Academy Sandhurst. Initial Officer training is a series of 4 modules.
Consolidated training courses are run at Sandhurst allowing you to potentially complete all of your Reserve Officer training in a single eight week package. The course ends with a formal Commissioning Parade in front of Old College to which family and friends can be invited.
Module A & B : These are either broken up into seven weekends with an Officer Training Corps or each done as a consolidated two week course at Sandhurst.
Module C: This lasts for two weeks and takes place at Sandhurst.
Module D: The two week Army Reserve Commissioning Course at Sandhurst, which is the culmination of your leadership and management training.
This will gain you your commission, you will still need to attend your trade training, for Infantry that would be the 2 week Platoon Commanders battle Course.
A good article on Reserve Commissioning Course can be found here written by a head teacher who has completed that journey.