Originally Posted by
omarlc
Does anyone have experience of upgrading a companion booking on one leg from J to First? Is it even possible?
You can't upgrade (UuA). However you can change it, so if reward availability does open up in a higher cabin you can call to change in to the higher cabin. The cost will be the extra avios due, a change fee of £35 per person, and any extra taxes/fees/charges which are due.