Noticed that it is now 8% bio fuel diesel whereas the Rrs states not to use more than 5% bio fuel, any implications in using the Tesco juice?

Having had LR for many years varying from swb tcab, through 90 Turbo , 200 Tdi, 300 tdi, and back to another 300 tdi t/cab which we have now had for ten years or so.. Also have had 200 disco, 300 dicso, twice and two Td5s last one for the last 6 years. Now we have bought a secondhand...