If something costs £1.49 and I asked you which whole pound it was closest too, you'd say £1 because it is 49p away from £1 and 51p away from £2.
You wouldnt said it's closer to £2 because it rounds from £1.49 up to £1.50 which then is rounds to £2. That's wrong. The last digit has nothing do do with it. The only digit that matters is the digit directly to the right of the whole pound number.
It doesn't matter if you're rounding to a while number or a decimal place; whichever place to are rounding to, the only number that has any effect is the one directly to the right.
So, round £1.49 to the nearest pound. That becomes £1 because you only look at the 4 directly to the right of your rounding point. You'd never go all the way to the end, in this case 9, and round the 4 to a 5 and then round the £1 to £2. It doesn't work like that.
If you went into a shop and offered £1 for something that cost £1.49, I doubt you'd walk away from the shop with the item.