Isn't peat the very worst of all fossil fuels?
In Ireland, yes.
On the Western Isles, I think it is on a par with cutting your own firewood.
(based on the fact that a greater volume of peat develops each year than is removed)
I’m not sure that is correct. Peat regrowth is about 1mm per year, and banning the use of peat is becoming more widespread due to the impact that removing peat is having on the environment.
big sigh
There are fundamental differences between Ireland and the Western Isles.
Ireland permits commercial extraction, nearly all extraction is done by draining the bogs to give machinery access. Even when the cutting is done by hand, they drain the bogs so they can drive in and out.
In the Western Isles, selling peat is illegal. You can only cut peat for your own use.
Cutting is done by hand, extraction by carrying it to a road. The bogs are not drained.
Indeed, the old banks show a higher rate of growth than outside the banks, because the banks form a sort of 'swimming pool' that remains wet and sodden all year round.
You have to consider the volume of growth vs volume of extraction. Sure, the decomposed peat only forms at 1mm a year - but a year's supply for me is one spade width, two spits deep (about 600mm) deep, for 50m. It grows back faster than extracted. This can be seen in the banks, where the centre (oldest growth) is nearly level with the top of the bank (which has also been growing and getting deeper).
Nearly everyone considering banning peat use looks at Ireland. What they do is wrong, wrong, wrong.
It is like comparing clear-felling old growth forestry (with no replanting) with selected thinning plus replanting.