Postage is by Royal Mail to the UK only and is based on spend as follows

Spend	Postage Rate
£0 - £3.75	£0.75
£3.76 - £9.99	£1.00
£10 - £19.99	£2.00
£20 - £29.99	£3.00
£30 - £39.99	£4.00
£40 - £49.99	£5.00
£50+	FREE