Depending on what sort of soil you have, fence spikes can be a good, less disruptive and quicker alternative to digging holes and concreting-in your fence posts. The spike element is normally around 50cms long with a square metal ‘box’ on top to secure the fence post. This is banged into the earth (so you need a depth of soil of more than 50cms), then the fence post is inserted.
It’s worth noting that there is a second set of fence spikes, or wall spikes. These are rails of spikes that you can put on top of your fence to deter cats and foxes from jumping over into your garden.
Putting a gate into a fence puts a lot more physical demands upon it – the gate will need to be set on hinges and, when opened, will create torque. This twisting and turning force needs to be absorbed without impacting on the fence as a whole and, therefore, you’re going to need a bigger post. If you need to have a secure gate also bear in mind the non-hinged gatepost which may need to be of equal size in order to be robust enough to carry a decent sized padlock.