As haven't seen it on this forum, thought I would note a helpful tool that allows you to quickly check how many seats are available in each class for TK flights. Especially helpful for seeking out those J upgrades, and much quicker than using TK's painful website.
Used it today to check on a BOS-CPT flight in April. Found one with 4 seats in J. Booked it. Called and got my E+ voucher upgrade in less than 5 minutes with the US call centre number. Fastest and easiest experience I've ever had processing an upgrade with TK. Website is below...
https://flightavailability.bcdtravel...MnAvlMain.aspx