CLAIMS 1. A method of preparing a hybrid capsule, the method comprising: heterocoagulating organic polymer latex particles with a primary capsule to form an organic polymer coating layer over a shell of the primary capsule. 2. The method of claim 1, wherein the hybrid capsule is an organic- inorganic capsule and the primary capsule is an inorganic capsule. 3. The method of claim 1 or 2, wherein the heterocoagulating step is at least partly carried out at a temperature that is no less than the glass transition temperature (T$_{g}$) of the organic polymer latex particles. 4. The method of claim 3, wherein the heterocoagulating step is at least partly carried out at a temperature of from 10°Cto 80°Cand/or at a pH from 2 to 11. 5. The method of any one of the preceding claims, wherein the heterocoagulating step is carried out in the presence of two opposing charges, a first charge being associated with the organic polymer latex particles and a second charge being associated with the primary capsule, the second charge having a polarity that is opposite to that of the first charge. 6. The method of any one of the preceding claims, further comprising introducing the primary capsule into a larger volume of the polymer latex particles prior to the heterocoagulating step. 7. The method of claim 6, wherein the step of introducing the primary capsule comprises introducing a plurality of primary capsules until the