There is currently an issue that Simple Delivery not offering Custom Postage to oversize items, lightweight items and those under £10, these are all exempt from Simple Delivery.
There is a workaround.
From the link below Go To Solution and follow the advice in Rick's answer to list your item.
That still will not let me list it as it's over 2m long .
I can send the item through my work but it seems the option to override simply delivery has gone , none of the couriers will take parcels that length .
