I've been bringing meat in virtually all the time.
It's the uninspected/wrapped in brown paper stuff that they get very excited about, and with good reason IMHO.
Joints, sliced, tins etc from a supermarket, clearly marked, have all been waved through with little or no interest. If they ask, I am honest and tell them what I have. So far they have been very reasonable.
There are no guarantees's but.........

to customs thus far.