In conclusion, we have shown that the continuous breathing behaviour of MIL-88A(Sc) (1) can be controlled both through direct synthetic methods as well as postsynthetic installation of linker functionality. By adjusting the reaction conditions for the modulated self-assembly of 1, a rigid and porous analogue, 2, can be synthesised. Whilst 1 exhibits the flexibility characteristic of its topology and closes on removal of pore-bound guests, 2 shows enhanced gas sorption properties as a consequence of bridging formate linkers buttressing the MOF enforcing structural rigidity.