Well, comadreja, not wishing to take issue with your post but, in UK, it depends what the doctor ticks on the blood request for what comes back from the lab. If he ticks off 20 tests, you'll get 20 results back. Bloods are tested on the same day they are taken in UK and results are sent back via computer at 1800, 0600, 1200 and again at 1800 (not sent at 0000 hours as most surgeries computers are being backed up at that time).
I have never seen a cholesterol level reported as <40 mg/dl or whatever. They are always given as LDL reading, HDL reading and total cholesterol in millimoles (mmol) per Litre such as 5 mmol/L. You will also get your Triglyceride reading at the same time.
I know the British system can be pretty poor but not in that area.
The only time I had my bloods taken in Spain was at the hospital and the results were back in less than 30 minutes. This will also happen if you are seen in A&E in UK, the only difference in UK being that you will probably wait 4 hours before the bloods are taken!