Spark Plug

For the benefit of my dad who wants to see how much of the spark plug is left in my poor corroded car. This is what was left after the RAC man broke the conical porcelain bit at the bottom and threw it into the grass. The thread is stuck in the engine, corroded on.
No garage would take this problem on for fear of dropping a bit into the engine, but eventually managed to find one who won't give me a quote for the work yet! But being toed is quite exciting, apparently I'm a natural! *smiles proudly*