>The best HadCRUT temperature data file to use is here.

In order to be able to compare the results, I would need to use the same data file as they use in Humlum at al and realclimate, even if this may not be necessarily be the best.

In particular it seems the temperature files they used described temperature anomalies, so one would need to know
the exact references or averagings which are used for the data.

Your file doesn't say how the values are derived. Moreover I'd prefer that the columns in such a data file are described within the file.

So it seems that since the temperature data vanished, the results of Humlum et al and realclimate can't be reproduced.