many phals, especially the mini-phals, do not need to be staked. You should try it with one or two - you may prefer it. The stems are strong enough to support the blooms.
Some of the species and primary hybrids do have "ugly" spikes though - they almost grow out horizontally. Those are sometimes staked for vertical presentation.
BTW - it will be interesting to see - especially in your UK weather

- whether a North facing window will provide sufficient light for your phals.