I pay just thirty odd pound for complete set of ink cartridges and they last me atleast a year
Yup, it's gone up now. The £99 at Amazon was actually sold by Co-op.
I can only find it at £107.99 at Amazon https://www.amazon.co.uk/Brother-HL-3140CW-Printer-Wireless-Connected/dp/B00BJOA3HQ But agree - £99 at Co-op :)
It's £99 delivered at both Amazon and Co-op.
That's typical of Viking, why post pre-vat prices anyway, it's not as if you don't have to pay it even if you're vat registered, you always (with UK traders) pay it upfront.