No, but if it is an Avios.com voucher you can book the flights in whatever names you like - I'm doing that in a couple of months where Mrs LA and I are using the AmEx 241 to go F through BA.com, and I've booked LA Jr and the mother-in-law on the same flight in Y using Avios.com and the LTSB voucher. I wonder whether I'll end up sitting in F on that flight.....