For a short few days, until 22nd September 2020, there are one million British Airways seats on offer for £35 each way in Euro Traveller for travel until 31st March 2021.
Club Europe fares on about 60 routes are also on discount with a slightly later end date of 30th September 2020. The cheapest I could find was £108 return to Dublin, but several other good fares are available such as: £129 return to Krakow or Luxembourg, £149 return to Prague and Vienna or £169 return to Nice.
You should check the lowest fare finder page for other fares. There are currently no change fees due to the Covid-19 pandemic, so if you need to change your travel date for any reason, then you can pay any fare difference if required.
Separately, there is also a BA Holidays sale on Caribbean destinations, similarly with booking until 30th September 2020 and travel up to 31st March 2021.