The airline has announced a sale for bookings made up to Tuesday 24 September

Reduced prices appear to be offered for practically all destinations, in economy and business class.

Europe Fares are quoted one-way and are very interesting, for example:

Alicante & Barcelona from £39
Helsinki from £86 (When choosing a return availability I found an even lower £66 one-way and £146 return fare)

Fare East fares e.g. Bangkok £744 even in December are pretty spectacular – considering the high price of oil.
The actual air fare received by the airline is £600 and the remainder, £144, is comprised of UK government tax (£83) and airport charges

To see all the destinations you should visit this page but you should be aware that the prices advertised are offered for departure dates and you then need to search to find an inbound fare at a reasonable price.

So, yes, the sale is genuine but you may have to spend some time searching to find a price you’re willing to pay