L is another letter with evidence of origins in Egyptian writing. The symbol for ox goad, or whip used to drive the ox, reappears in Phoenician, Etruscan, and Greek, each with a degree more of refinement. If you ever need an A without the crossbar, take a look at capital Lambda. (And I’ll put that tip with A where it belongs.)
The stylized L with a line through it that symbolizes the British Pound, £, is said to have come from a blackletter-style L, like the one in Jim Parkinson’s Avebury, though I’d like to see more evidence before passing this off as fact.