Hello, Sez, and welcome to Talking Point. I'm sorry to hear about your mother's diagnosis but hope you find support, help, and advice here on TP.
The UK Alzheimer's Society has good information on their website, when you have the time and/or feel up to exploring. Some places you could start:
Types of dementia:
https://www.alzheimers.org.uk/info/20007/types_of_dementia
Help with dementia care:
https://www.alzheimers.org.uk/info/20046/help_with_care
Caring for someone with dementia:
https://www.alzheimers.org.uk/info/...tanding_and_supporting_a_person_with_dementia
Other good advice is the Compassionate Communication guide, which I'll let someone else post a link to, because I can never find the one I like!
There's a lot of good information here on TP if you have a read through current and older threads. Please always feel free to ask questions.
Dealing with dementia is a steep learning curve but there is some help available.
I hate to present you with a to-do list, but sooner rather than later, you will want to get some paperwork/administrative things taken care of (powers of attorney, attendance allowance, help with finances, et cetera; I will let the UK folks comment more specifically on these) as well as figure out what help and support will be best for your parents and you, both immediately, and in the future.
One hard and fast rule dementia has taught me is ALWAYS accept help when it's offered, even if you don't think you need it. It's a marathon, not a sprint, and you need all the help you can get.
Sending very best wishes to you and your family.