When you see a note about all main services, it implies that the property has electricity, gas, water and main drainage connected, unless stated otherwise. That said, if gas is particularly critical to you, please check specifically, since some villages have no gas supply and hence nobody thinks to mention it.
Private drainage will mean either a septic tank, which will need emptying infrequently, or a cesspit which may require more regular attention. Don’t dismiss either out of hand as both systems can work well – and the water rates will be less than would otherwise be the case. This saving can often exceed the maintenance costs.
A telephone service is normally available nation-wide, and increasingly cable
in urban locations, but again please check what is connected to any property you
are looking to buy as these connections are not necessarily included in the expression
‘all main services’.