UK - £1 flat rate.
EU - Decals. £1.00 for 1-2 sheets, £1.52 for 3-4 sheets, £2.45 for 5 or more sheets. (Exact cost of the stamps.)
EU - Non-Decal. £1.00 plus 10% of order value.
Rest Of World - Decals. £1.33 for 1-2 sheets, £2.25 for 3-4 sheets, £3.15 for 5 or more sheets. (Exact cost of the stamps.)
Rest Of World - Non-Decal. £1.00 plus 20% of order value.