I've basically stolen OBG's list from the definitive 1Y guide and added a few bits. Wanted to post this here in case anyone recommends anything else? Probably best to order it all together

I had trouble finding this on OBG's list too:
Coolant flange - T3 D/TD Large - ALLOY T3D.......121 133 E... They only seemed to have a plastic flange?
Cheers!
Flywheel bolt set - inline 4cyl
https://www.brickwerks.co.uk/flywheel-b ... -4cyl.html" onclick="window.open(this.href);return false;
Guide Sleeve for release bearing
https://www.brickwerks.co.uk/guide-slee ... 3-all.html" onclick="window.open(this.href);return false;
Cam/Crank/I shaft oil seal
https://www.brickwerks.co.uk/camshaft-c ... w-use.html" onclick="window.open(this.href);return false;
Crank oil seal - VW Diesel [Flywheel end]
https://www.brickwerks.co.uk/crank-oil- ... l-end.html" onclick="window.open(this.href);return false;
Full Clutch - T3 Diesel
https://www.brickwerks.co.uk/clutch-t3-diesel-all.html" onclick="window.open(this.href);return false;
Oil Cooler Sealing ring
https://www.brickwerks.co.uk/oil-cooler ... w-use.html" onclick="window.open(this.href);return false;
Oil Dipstick Funnel
https://www.brickwerks.co.uk/t3-diesel- ... unnel.html" onclick="window.open(this.href);return false;
Crank pulley bolts
https://www.brickwerks.co.uk/crank-pull ... esels.html" onclick="window.open(this.href);return false;
Cambelt and Tensioner
https://www.brickwerks.co.uk/cambelt-ki ... -late.html" onclick="window.open(this.href);return false;
Oil Pump
https://www.brickwerks.co.uk/oil-pump-t3-d-td.html" onclick="window.open(this.href);return false;
Spigot bearing
https://www.brickwerks.co.uk/spigot-sha ... nline.html" onclick="window.open(this.href);return false;
Gearbox Oil
https://www.brickwerks.co.uk/gearbox-fi ... -17mm.html" onclick="window.open(this.href);return false;