If anyone out there does know, I would be grateful if you could answer this question I have: I joint the OTC in September 2006, commissioned into the OTC in September 2007 (cat B commission), transferred to the TA (cat A commission) in April 2008 and then attended regular Sandhurst in 2009 commissioning in August 2010. This has been continued service with the same service number. Do I gain any seniority for pay/promotion as a result of the service prior to Regular Sandhurst? Apologies for the slight life story! Would be very useful to know. Many thanks.