Nice, I quite like the raleighs with the white head tubes, a nice colour scheme.
It's not a 'lightweight' tube set such as 531, but not a nail either. My other halfs Wisp from roughly the same period has the same tubes I think and makes a nice bike.
I reckon from the downtube sticker it's mid to late eighties, but as already said check the other areas for dates, also the serial number on the bottom should give an idea of year and where made, I'm assuming it would be Nottingham.
What size are the wheels/tyres, either 27inch or 700c? That should help date it also.
Cleaned and serviced would look quite classy.