Can black play the London system? After 1. d4 d5 2. c4 c6 3. Nf3, Black usually plays Nf6  or e6 (which blocks his light-square bishop) and I wonder if it is possible for him to adopt the ideas from the London System and play Bf5 before e6. This is a rare move but I wonder if it is sound. After all, black is one tempo down compared with the London System by white. But is black's position solid enough to compensate this?
That is the Slav, but the problem for black in many of these lines, and specifically immediately, is that if 3...Bf5, then 4.cd cd 5.Qb3 forces you to sacrifice d5 or b7 since 5...b6 just loses.

         [FEN ""]

         1.d4 d5 2.c4 c6 3.Nf3 Bf5 4.cxd5 cxd5 5.Qb3! b6? 6.e4! (6.Nc3) Bxe4 (6...dxe4 7.Ne5+-) 7.Ne5 a6 8.Ba6! Ra6 9.Qb5 Nd7 10.Nd7! Qd7 (10...Ra5?? 11.Nf6++#) 11.Qxa6+-


This is just one example, and white can also play it more quietly with 6.Nc3 instead of 6.e4, but no matter how you do it, it is either the loss of a pawn with insufficient compensation, or worse, death on the light squares.

Lastly, you can try to postpone Bf5, but the same basic ideas are still strong later, or you lose a tempo with a6 putting you two tempi down on the same white opening. Basically, the answer is "no", the position cannot withstand the attempt to bring the B out early there.

P.S. I just looked at your picture again, and noticed the computer eval listed, and that +.73 is modest. It will probably grow after just a few moves.