spread bet and pips

I have been using spread bets accounts up to now, but want to start using a broker, one thing if someone can clarify is what is the value of a lot?

i.e in my spread bet account if i have 5000 and my max risk is 1.5% then i am risking £75 so for ease if my stop loss is 75 point below my entry i know i can bet £1 per point.

can someone tell me how to work this out in lots / £ please?

essentially the same, but you can also risk all your entire account in one trade

so if i have the same account size and conditions as a above and i trade one lot with an s/l of 75 i am only risking £1?

No, well i don't know exactly how the spread betting work, but let's make an example about forex:

Now,let's say you have 5000 usd in your account, and the broker give you a leverage of 100:1 .

Now, 5000*100 = 500.000 , 500k is the money you can trade.

1 lot is 100k, so with 5000 usd you can trade 5 lots if you like, but let's say you only want to trade 1 lot, so you for example buy 1 lot of eurusd.

Each pip will affect your account of 10usd, so with a 75pips s/l you will risk 750usd, you can choose to put a 10pip sl or 50pip sl or 1000pip sl or put no sl, you can decide the risk of each trade you do, how about spreadbetting? how does it work?