Two methods i have used for lighting my army issue trangia are:
Remove the rubber seal from the burner cap, place a little meths in here - maybe a teaspoon full, light and put your burner filled with meths on top - warms the fuel up nicely
You can also use lighter fluid (NOT PETROL) in small quantities (maybe about 2% - a large teaspoon full in a pint of meths) to lower the ignition point of the cooker fuel. This does mean your stove creates a little more soot, but the flame will not be as blue and is easier to see
Barblade
Remove the rubber seal from the burner cap, place a little meths in here - maybe a teaspoon full, light and put your burner filled with meths on top - warms the fuel up nicely
You can also use lighter fluid (NOT PETROL) in small quantities (maybe about 2% - a large teaspoon full in a pint of meths) to lower the ignition point of the cooker fuel. This does mean your stove creates a little more soot, but the flame will not be as blue and is easier to see
Barblade