£1.5 million in the grand scheme of things for a lottery win is not a great deal these days. IMHO
Most people tend to think that they'd pay off people mortgages such as family and friends etc..... but in reality that would not leave a lot left.
Whereas if they used the money and made it work for them they could increase in significantly over time and do more good with it.
To be honest if I won £1.5 million I would probably give 10% to charity and I've always had this idea that i'd have envelopes with £1000 each in them and everyday for a period of time I'd give away one to someone random I thought deserved it. Just someone that day that touched me, like an old woman struggling in the rain etc.....