Barclays upgrade voucher – does it work on multi city routes?

[spawn606]

Hi all,

Say I made a single avios booking with the following:

Jan 1st: Tel Aviv > LHR
Jan 10th: LHR > JFK

Jan 20th: JFK > LHR
Jan 21st: LHR > Tel Aviv

Would the barclays upgrade voucher apply to the entire booking or to specific flights only? If all are booked in Premium economy, looking to upgrade to J?

Thanks

[NorthernLass]

No, because the upgrade voucher can only be used on flights departing from the UK.