corrugated cardboards

sheets:
http://www.postpack.co.uk/acatalog/board_pads.html
837x600mm singlewall £1.08 (also smaller and larger)

rolls another shop:
http://www.bagnboxman.co.uk/catalogue/page31_corrugated-cardboard.php

pads in packs of 10:
single
http://www.thepackagingstore.co.uk/products.asp?subcatid=336

Dimensions (mm)	Pack Qty	Price per pack 1+ 5+ 10+ 20+ 30+

445 x 255 10 £2.49 £2.37 £2.12 £1.87 £1.62

450 x 450 10 £4.89 £4.65 £4.16 £3.67 £3.18

470 x 330 10 £2.49 £2.37 £2.12 £1.87 £1.62

550 x 365 10 £3.89 £3.70 £3.31 £2.92 £2.53

715 x 450 10 £9.45 £8.98 £8.03 £7.09 £6.14

795 x 337 10 £3.99 £3.79 £3.39 £2.99 £2.59

900 x 365 10 £6.50 £6.18 £5.53 £4.88 £4.23

945 x 455 10 £8.29 £7.88 £7.05 £6.22 £5.39

1095 x 905 10 £7.39 £7.02 £6.28 £5.54 £4.80

double
http://www.thepackagingstore.co.uk/products.asp?subcatid=337

Dimensions (mm)	Pack Qty	Price per pack 1+ 5+ 10+ 20+ 30+

310 x 260 10 £15.19 £14.43 £12.91 £11.39 £9.87

403 x 355 10 £7.59 £7.21 £6.45 £5.69 £4.93

460 x 260 10 £15.39 £14.62 £13.08 £11.54 £10.00

610 x 260 10 £7.99 £7.59 £6.79 £5.99 £5.19

710 x 460 10 £11.35 £10.78 £9.65 £8.51 £7.38

760 x 260 10 £22.39 £21.27 £19.03 £16.79 £14.55

760 x 460 10 £8.99 £8.54 £7.64 £6.74 £5.84

760 x 760 10 £12.69 £12.06 £10.79 £9.52 £8.25

760 x 610 10 £28.89 £27.45 £24.56 £21.67 £18.78

910 x 260 10 £23.49 £22.32 £19.97 £17.62 £15.27

910 x 710 10 £13.69 £13.01 £11.64 £10.27 £8.90

910 x 760 10 £15.49 £14.72 £13.17 £11.62 £10.07

1060 x 710 10 £16.59 £15.76 £14.10 £12.44 £10.78

1060 x 260 10 £35.69 £33.91 £30.34 £26.77 £23.20

1160 x 710 10 £19.89 £18.90 £16.91 £14.92 £12.93

1180 x 1040 10 £29.19 £27.73 £24.81 £21.89 £18.97

1210 x 260 10 £53.69 £51.01 £45.64 £40.27 £34.90

1210 x 760 10 £21.29 £20.23 £18.10 £15.97 £13.84

1310 x 710 10 £19.69 £18.71 £16.74 £14.77 £12.80

1410 x 860 10 £26.99 £25.64 £22.94 £20.24 £17.54

1610 x 860 10 £30.29 £28.78 £25.75 £22.72 £19.69

1810 x 860 10 £34.29 £32.58 £29.15 £25.72 £22.29

2070 x 670 10 £21.39 £20.32 £18.18 £16.04 £13.90