Usually I have found rust to spread quickly on garlic as soil dries in late April and May. This year my garlic leaves grew orange quite quickly in the briefly dry winds of late May and I was not too worried, but the difference since then was the rust being turned to rot by relentless moisture on all leaves. All my garlic is now harvested and drying, having stopped growing early, but it is mostly alright, about 5% lost its outer sheaths to rot. Solent Wight was indeed badly affected and is on the small side.
Leeks are currently looking good with no rust!