To tell my manager I won’t share a room with colleague again?

Be that as it may, but an ad hominem attack on this particular colleague is the weakest way to make your argument and casts you in the worst possible light.

This is totally unacceptable. You should not even know these things about a work colleague let alone be discussing them. Do you think this is dignified for her snoring to be a subject of your thoughts when she is just a work colleague?

I would never agree to sharing anyway

Christ alive this is terrible of your company. Basically blackmailing you with the threat of redundancy if you don't comply with their wishes.

It's also completely unacceptable to have to share details about your colleagues personal life and habits to get out of this situation. Really awful and she would be well within her rights to bring a harassment claim. What anyone does in a hotel after working hours is none of anyone's business let alone your line manager.

If you want to stop without just saying "no it's unacceptable" without the risk of being made redundant then make something up about yourself. Sleep apnea that had just developed, heavy periods whatever. But you should just be able to refuse without giving a reason.

I have 25 years experience in employment law by the way, so this is not an uneducated opinion. If they did make you redundant you'd have a great Employment Tribunal case.

Also it must be a proper hotel if it’s doing room service so suggest that they pay for premier inn / travel lodge type of accommodation instead and make the savings that way , all getting your own rooms obviously .

Absolutely ludicrous suggestion. Why on earth should she have to pay? It’s a totally unreasonable request in the first place for her employer to tell her to share and one that should never have been agreed on.

I’m intrigued as to whether your company expects two male colleagues to share a room when away travelling?

No.i wouldn't do it.
Next time they ask say "I don't share my personal time or my home with Tracey, so do not expect me to share a hotel room."

Agreed

Even my loveliest colleague is not someone I would share a room with. SO inappropriate- and as a PP pointed out they wouldn’t make you share with a man…would they?!

There’s nothing in OP’s post that suggests she’d be fine sharing with a skinny snorer who keeps her awake at night. But I’m sure the ordering a second dinner to the room grated when the woman acknowledged that it was her weight that made her disturb OP. And the lack of sleep probably made OP feel a lot less accepting of that choice.

This should only happen in a War/Civil conflict situation. Otherwise it is only with your consent/request: Not Ever at their convenience.

That’s a completely shocking and unsafe company policy. If it’s so bad to fork out an extra few quid for everyone to have their own room they need to send fewer people, or get an Airbnb with 2 bedrooms

It doesn’t matter. It’s not appropriate for colleagues to share a room. If they can’t afford to properly fund work travel, they need to reduce it, find other ways to meet the objectives of site visits, or quite frankly, the business isn’t viable.

That is a totally different scenario. I have been a PA most of my life in the financial/pharmaceutical/armed services sectors. . NEVER has a male been asked or been required to share sleeping accommodation (apart from submarine/sea going armed vessels) with another colleague of the same or opposite sex.

Absolutely tell them you won't. Why would they force you to share a room with someone you barely know? Just say you're not comfortable sharing with anyone but your own family.

I don’t even share a bedroom with my husband because of his snoring. No chance I would share with anyone never mind a colleague.

well you aren't being unreasonable but I would have refused the first time.

Thin people, and women, also snore. The worst snoring I’ve ever heard in my life was from a very slender 13-year-old girl. The woman’s weight is irrelevant and snoring ‘like a man’ isn’t a thing.

You were nuts to agree to sharing rooms with colleagues in the first place. Totally unacceptable and an invasion of privacy. I guarantee you she didn’t enjoy sharing with you either, so you both need to say it’s not acceptable.

She doesn't snore like a man. She snores.

Now you sound as if you're having a go at her because she's fat. Snoring isn't always caused by excess body fat, though it can be. Obese people are not always 'choosing not to shift some weight', they are just as likely struggling with an eating disorder and finding it very hard to eat more healthily. Anyway, she's unlikely to manage to drop several dress sizes before your next business trip just on the off-chance that her snoring goes away.
If the snoring is keeping you awake and therefore impacting on your ability to do your job properly, you'll have to say that you can't share with her again. But there's no need to draw attention to her eating two dinners or spending a long time in the loo - that's mean.

I regularly run school trips abroad and have almost always shared with another member of staff. We all do, or we have to pay extra to have a room on our own. You are definitely not being unreasonable not to want to share with this colleague though.

I'd refuse to share with a colleague period.

Requiring employees to share bedrooms has the potential for serious HR issues and I find it strange that it is expected.

So I think you are not unreasonable to tell your employer that your days of sharing are over, but don’t make it personal about this woman.

Your "employer" wants to shed costs: It is not about you and you are, probably, not being paid overnight. They are paying you for your time, so they should make sure that you are comfortable during your own time. If/when it is overnight then you should be able to insist on a single occupancy room or refuse to go. Do not sacrifice your own comfort for your employer's cost cutting exercise.

What if your college was a different sex? Would they expect you to share? Of course not. Your employer is taking the piss

They pay for separate rooms or you don't travel.