I came across this a few months ago during our great weather in May of the Covid lockdown. As a big prosecco and champagne fan, this one ticks all the boxes.
I don't find it sweet at all and the bubbles are very champagne like.
Available in Tesco for €12.99
[update April 2022 - I haven't been able to find this in Tesco since Brexit so not sure what's happening with this product - if I ever locate it I will be sure to update here.]