There are clearly some blokes here who might know enough to comment so I’m going to ask here rather than create a whole new topic.
I am in early stages of the process myself and have a million and one questions that I’d rather not go gobbing off to every officer in the Regiment with. I understand these would all be answered in time but the current climate has me sat at home restless so any help would be appreciated.
When going to Sandhurst for a DE commissioning course as an already serving solider, are you expected to bring any of the 1157 kit, high ticket items like respirator or helmet etc. But even down to shirts and trousers and do TRFs/patches have to be removed prior to attendance if so.
If opting to commission into the same Corps is there a marked advantage?
I’m aware medals are worn when in mess dress/1s etc but Is Rank expected to be worn at other times or essentially left at the door?
It's still the same. The OP's QM chain will remove some items and new will be issued at RMAS. Medals, qualifications badges etc are worn on No 1 Dress so you will stand out a mile on parade.[Disclosure - it's a very long time since I did it.]
Basically I went to RMAS having handed in everything to my parent unit except clothing (working dress, DPM kit, No2s, boots). Everything else was kept by my unit, and I didn't have to know what to hand in - I was told. So back in the day, helmet, respirator etc were taken from my sweaty palms by my parent unit rather than me giving it.
Once at RMAS there is a quite lengthy induction process, mostly paperwork but for those who have already served one hands ones uniform into the stores. All details of relevant badges (e.g. wings) and decorations (but not rank) are noted when the kit is taken. Pre-RMAS rank was left in the stores.
One of the nice things at the time was that when one eventually got one's new kit was that it was all sized correctly and if any tailoring was needed (for Blues) and any applicable qual badges sewing on, it was all done for you. Bit of a change from being issued kit as a soldier. The kit is not something to lose sleep about.
Regarding going back to the same Regiment or Corps (which I did), it depends on a whole host of factors - what is the attitude of the officers to that; will you be working with many people who used to outrank you; is it actually the place where you can be happy and make a really successful career? There's no hard and fast answer, but I would argue that as an officer you are expected to be good as a leader, and not a technician so having previously served gives an advantage initially but one needs to concentrate on the leadership (besides, what Pl Sgt wants the Pl Comd doing his job for him?).
Don't sweat the admin side, but have a good think about the very different nature of the job you will be required to do if commissioned.
[Final reminder - it's a very long time since I did it.]