This is just out of curiosity, When stating that they arrange Dask insurance from the UK (the compulsory dask) so they supply you with the original gov dask as below.
Our house ins is up for renewal, 3 beds 150sqm, last year cost approx 417ytl with extra Dask (included in this price, extra build, 100,000YTL). at todays rate this is approx 165GBP.
I will have to email them to obtain a quote. I am really curious to the gov dask though.