Stop leaks from S30 brewing valves 

Small valve rubber for Brass S30 & Hambleton Bard: (l x OD x ID = 7mm x 6.5mm x 4.5mm) (www.ebay.co.uk/itm/165328270014) £4.70 for 5
or 6 x 4mm clear tubing (www.ebay.co.uk/itm/185643092725) £3.50. This worked perfectly and stopped the leak.
Large valve rubber for Brass S30 (10 x 12 x 10.4mm) and (8 x 12 x 10mm) on hambleton bard. Replacements (www.ebay.co.uk/itm/165328270156) £4.70 for 5 or silicone tubing 12 x 10mm (www.ebay.co.uk/itm/124551824416) £5.60/m.
Brass S30 large o-ring: 17mm OD, and Ø2.5mm (www.ebay.co.uk/itm/185309160337) £2
Brass S30 small o-ring: 12.2mm OD, and Ø2.5mm
Hambleton Bard small o-ring: 13mm OD, and Ø1.8mm Ebay £1.50
Brass S30 gasket: 26mm OD, 15mm ID, 2mm thick
Hambleton Bard gasket: 26mm OD, 18mm ID, 1mm thick (www.amazon.co.uk/Solid-Silico...)
Pressure cap o-ring: OD: 55mm, ID: 40mm, thickness: 4mm
Youngs pressure barrel cap seal kit: (shorturl.at/aefyW) £4.25+p&p,
Brass S30 valve seal kit (www.ebay.co.uk/itm/164646202331) £4.70
Hambleton Bard valve seal kit (www.ebay.co.uk/itm/164096494497) £5