Originally Posted by David-A

So you have only sent £2.50 to Avios.com?
assuming on the normal rate that converts to 600 Avios. Before the 400 bonus for 2.50 multiples.

Note: there are two promotions running currently at both Avios.com and Tesco.

Firstly, until end of march every multiple of 2.50 converted you get a bonus of 400 Avios points.
Everyone who is UK based is eligible for this bonus.
This is the bonus I mentioned above.

Secondly, if you have not converted Tesco to your account in the last 12 months, you are eligible for the second promotion, here as long as you earn 1500 Avios or more (from converted Tesco bonus points) per quarter you will get a 2000 Avios per quarter bonus into your account. (note you need to have earned 1 Avios from another source, it can't be a virgin account, etc.
And quarter 1 for this promo ends at end of feb.

As such dannyrado I don't think - unless you have made other conversions this quarter, or you were not eligible for 2nd promo due to conversions to Avios.com
(airmiles.co.uk) in previous 12 months - you have converted enough to Avios.com to trigger the 2k there.

At the normal rate, you will want to send 7.50 or above to each (6.50 would be enough to get over the 1500 at 1560 Avios, but 6.50 is not efficient for the other promotion as not a 2.50 multiple, so 7.50 is next encountered level).

Therefore, if you qualify for the second promo as well as the first in both accounts (Avios.com and BAEC), then what you want to do is ensure you send a minimum of 7.50 to both schemes before the end of this month, and again minimum of 7.50 Tesco to both in march.
There will not be time to get any change back for march, so do not use some of your vouchers hold them back.
You can use 1 voucher and send it to both BAEC and Avios.com if you has both redemptions in the basket at same time. And keep to 2.50 multiples for best value.

Finally, how many Tesco points will you earn for the rest of the year?
If you qualify for the second promo in both schemes then you need 1500 Avios from Tesco to keep getting the 2k bonus per quarter (which would be 6.50 in Tesco,we don't need to round up to 7.50 as we are outside the 400 bonus points period)..
If you will not earn enough to keep triggering this for the rest of this year, hold the minimum you need back for this purpose.
But do check you meet qualifying criteria, other wise it is a waste as you will miss out on the 400 bonus.