Polystyrene wanted, chunky as poss (Sunbury TW16)

Planter far too big for purpose, thinking best to fill from the base upwards with polystyrene and then fill with ready and waiting compost… typical over ambitious husband present, she only wanted to grow a few herbs 🙄👍 thanks, can pick up obvs ideally as close to Sunbury as possible, little else to do this rainy Easter