Topping Up a Glowworm Ultimate Circa 2000

ns176897

We acquired this approx 20 year old boiler with our new home. It is wildly different from our old boilers and will be replaced soonish...in the meantime I have to bleed radiators and have no idea how/where the valve is to top up the system...there is some boxing-in above the boiler...any ideas to save me paying someone to do it??

Many thanks

Jeepers_Creepers

I don't think this is a sealed system boiler (or combi), so it'll be topped up automatically from the small F&E tank in the loft. Can you have as look to see if there is one? 

There is no pressure gauge on that boiler, so pretty sure this is the case. Bleed away...