Tesco or the PO for currency

Given the current rate is GBP/USD 1.5951 & GBP/EUR 1.1446, none of those seem very good.

Caxton is very wrong, the PO is offering $1.551 for example or was earlier ...

Whatever, I used Tesco, the rate was acceptable, I thought the service very good, and I had faith that it isn't a banking bubble and my money was safe (exchanging thousands makes me want this!).

Caxton is very wrong, the PO is offering $1.551 for example or was earlier ...

Whatever, I used Tesco, the rate was acceptable, I thought the service very good, and I had faith that it isn't a banking bubble and my money was safe (exchanging thousands makes me want this!).

The online rates for PO and Caxton as of right now are 1.5441 and 1.5660.
Tesco is 1.5458.
Puts Caxton at 2+cents/£1 exchanged. I have changed about 10K into Dollars and Euros this year so I am in excess of £150 to the good versus PO or Tesco before counting in the savings at ATMs.

BTW Caxton isn't a bubble like Crown Currency but is backed by Newcastle Building Society with the funds held in a secure client account. Seems good to me.