Sorry I needed to namechange, am a pretty regular poster.
I work for a small retail business (sole trader) and things have been declining for a while. We have a good working relationship but trade has been slower than anticipated.
I suggested cutting my hours as far back as September, but that was resisted until the end of November when I went from 31 hours down to 16.
Too little, too late and I received a month's notice on 6th Jan 
I've looked up my redundancy rights on Directgov and apparently am entitled to 3 weeks pay.
Based on what hours- my current, previous or a combination?
There's no mention of redundancy in my contract and holidays, sick pay etc are at statutory minimum rates.
Am acutely aware that they are just about managing to pay me and may not even realise that redundancy pay is due 
I need to broach this but would rather present correct info with links via email
Can anyone with (HR) knowledge help please?
Thanks.