@Squ1ggle, different Trusts do it differently. Some give exact numbers, some just categorise the numbers into low/medium/high risk and give you the category only, and some will do both.
@ForTheLoveOfDoughnuts, I think those numbers are really good. The Down's risk is higher than I've usually seen, but it's still way tiny - i.e. advice tends to not to do further tests unless risks are 1 in 100 or similar.
Everyone reacts differently to it though. I recently found out that my SIL has the Harmony test for her baby because while her results were 1 in 500,000, her sister got 1 in a million. SIL was worried, so wanted the test. Each to their own. You can't put a figure in peace of mind.