As RF said, you should be asking how to wire your garden socket correctly, not how to get around PP.
Buy yourself some 2.5mm 3 core SWA and run it from a surface mounted 30mA RCD fed from your gargae socket into a weather proof socket outlet in your garden. If you don't want to burry the cable you can run it surface in a location where it wont come to any harm.
I'll leave PP up to you.
Buy yourself some 2.5mm 3 core SWA and run it from a surface mounted 30mA RCD fed from your gargae socket into a weather proof socket outlet in your garden. If you don't want to burry the cable you can run it surface in a location where it wont come to any harm.
I'll leave PP up to you.