Unblocking Drains Outside ^new^ [UPDATED]

Before you stick your hand into the abyss, let’s identify the enemy. Outdoor drains don't clog with hair and soap scum like indoor ones. They face the elements:

Here is the golden rule of outdoor drain unblocking: unblocking drains outside

Determining responsibility (you vs. council) can be confusing. Before you stick your hand into the abyss,

Put on a sturdy pair of waterproof gloves—this is going to get messy. unblocking drains outside