Internal door furniture - advice needed please

I'm looking for furniture for the new internal doors I'll be having fitted soon.

My requirements are:
- All doors are 35mm thick
- Door handles with latches everywhere
- Bedrooms: thumbturns on the inside and key holes on the outside.
- Bathroom: 'turn and release', i.e. thumbturn inside and a screw (openable with a coin) outside

A friend of mine has bought some furniture for me but I'm not happy and will have to return it. He bought locks like for external doors, with euro profiles, and T35/35 cylinders, which are too long.
I've looked for T25/25 ones but can't find any. The shortest I could find are T30/30. I can use those, but they would stick out and look ugly.

I understand that this is because euro-profile locks are meant for external doors, which are thicker and require more security and therefore longer keys.
But I don't need security here, I just want my lodgers to be able to lock their doors without a key from the inside, lock them with a key from the outside, and I want to be able to open the door if necessary.

I'm wondering if there are different kinds of locks that would achieve the same but wouldn't force me to buy long cylinders?

Also the spindle in the turn and release for the bathroom is too long. Can this be cut back?

This is not for a family home is it?

Currently I'm the only occupier, once it's refurbished I'll take on 2 lodgers.

If I can't find thumbturn locks for these doors I'll get regular ones, with key holes on both sides...

5mm excess length on the cylinder would usually be absorbed with a thicker handle or escutcheon. You could mount the handles on a piece of plywood cut to size and shape to thicken the door at the handle area; this would be removable if you wanted to replace with ordinary handles later.

Fire safety would usually require all exit locks to be thumbturns including the final exit door(s), so you shouldn't have a deadlockable nightlatch on the front door that can be deadlocked from outside locking somone in the house, or have locks on the bedrooms that can be locked from outside.

Yes you can usually cut the spindle in the bathroom lock set to length.

Locks are not really intended for internal doors. Normally, if a lock is needed, then so is a thicker door. That's why a lock may be difficult to find.

You can get shortened Euro cylinders that wont protrude so much. But if you can't find any, it may be worth having a local locksmith make some for you. You could also have them suited so that you have a single master key for the different cylinders.

Thanks, I'll go for 60mm (30/30) euro cylinders. The escutcheons are around 7mm, so that will be roughly 5mm protrusion on each side. I guess I can live with that.

I'm surprised it's hard to find internal door locks. I'd have thought it would be quite a common thing for bedrooms with lodgers.