Vee One I am pritty sure it is one or the other.
You can get on with just A levels - now if you got AAA and got a 3rd in say Maths from Oxford/Cambridge/Other redbricks that IMO is better than getting EEE and a 2:2 in Media Studies from Scunthorpe (not sure there is a Uni there)
I know BA used to accept people with a 3rd if there A levels were good and their form was worded in similiar language
Just apply and see what happens - now that the age limit has been extended, work experience will come into play a lot more.
In fact there is a question about overcoming obstacles you need to fill in, getting good A levels then being disappointed with a third is an obstacle but then you can argue you got a good job etc
Mmm
Sagey