Complex sentence: The unit's selection process is now open to all infantry-trained personnel in the UK Armed Forces however, for Army Personnel, a tour with SFSG is regarded officially as an attachment to the Parachute Regiment.
Split into simpler sentences: The unit's selection process is now open to all infantry-trained personnel in the UK Armed Forces. However, for Army Personnel, a tour with SFSG is regarded officially as an attachment to the Parachute Regiment.