Three ferns of your choice for £12 (P&P is extra). It would help to nominate a reserve fern, just in case any of your first choice ferns runs out (but please state clearly that this is as an alternative, rather than a fourth plant ordered).
Oriental Ostrich Fern Deciduous fern with large open fronds up to 100cm and distinctive fruiting fronds in late spring. Grow in a sheltered position in cool moist soil. Spreads slowly.
Golden Scaled Male Fern Hardy and reliable semi-evergreen fern forming medium to large clumps of deep green fronds up to 125cm long. Plant in moist, shady soil.
Sea Pen Evergreen mat-forming, with dark green fronds to 15cm. Good for moist neutral to acidic soil, in in partial or full shade, but will grow in full sun in damp soil.
Soft Shield Fern Compact semi-evergreen fern with slightly arching upright pale green fronds to 90cm. Hardy fern for shade or semi-shade and moist soil.
Western Sword Fern Hardy evergreen fern forming a large clump of erect, narrowly lance-shaped, dark green fronds to 90cm. Can grow in damp or dry soils when established.