Advice needed re support bubble and Tier 2

[IsolaPribby]

I am looking on advice on whether this would be a good idea, or even allowed.

My Mum is 80, living on her own in London. She has been very poorly recently and has had a night in hospital, waiting for a Covid test. This has come back negative, but she is dehydrated, and has not been eating properly.

I am in Tier one, work part time, but have half term off, as have a 10 year old daughter. We were due to go to the IOW next week, but I am considering whether I should go and spend some time with my Mum to look after her. On my own, obviously. DD would be with DH.
It would give me a chance to look after my Mum, make sure she is eating, fill her freezer with meals etc..
She is currently in a support bubble with my sister, but she is not able to spend as much time with her, she just pops round shopping once a week or so.

So what would you think? I'm not desperate to break the rules, and would rather be going on holiday, but feel that my Mum would really benefit from an intervention like this.

Even without being in a bubble there is an exception to allow giving support to a vulnerable person. So my interpretation would be that you weren't breaking any rules. The exception is written more in terms of regular care giving, but there surely must be acceptance that there are sometimes one-off needs, like when someone is/has been ill. I can see that if you and your sister were both regular care givers, it wouldn't be sensible to have you both visiting if it could be avoided, but this situation is different.

Therefore your decision should be based on the relative risk to your mum of contact with you compared with the risk of decline because she hasn't had you there to set her up for the future.

You'd then also work out how to minimise the risk of taking it back home from London - it's not just about you and your family, it's about the other people you come into contact with at home and in London.

Are you able to drive there or do you need to use public transport? If you can drive and get an online food delivery for the food prep you can limit your exposure there although possible that your mum could pick Covid up in hospital.
My parents are same age and social services want me to attend meeting about care package for my mum at my parents house next week, needing to help with support of vunerable is allowed.

I would be driving there.

It's a valid point about the risk of bringing it back.

I'm still not decided. I need to speak with DH and my sister.

Care and support to your mum. It sounds necessary.