M&S now delivering to Netherlands

I have recently found out that M&S are now delivering to the Netherlands. This is great news and I will be ordering things shortly. However, I have noticed that their delivery price is 12.50 GBP compared to 10.00 for France, Germany and Spain.

Netherlands is lumped in with the likes of Albania, Belarus, etc.. Why?

France, Germany, Spain	£10.00	Approximately 6-9 days
Albania, Austria, Belarus, Belgium, Bosnia-Herzegovina, Bulgaria, Croatia, Denmark, Finland, Iceland, Italy, Liechtenstein, Luxembourg, Moldova, Monaco, Netherlands, Norway, Portugal, Sweden, Switzerland	£12.50	Approximately 7-10 days

I don't understand the logic, Netherlands is just across the water - there seems no sense in it. Does anyone have an explanation for this, in fact it might be useful for each of us to contact M&S and see what they have to say.