tfish wrote:UPVC windows and doors just need that black trim slashed and then they just push out.
Go for a old solid wooden door with hinge bolts OR a expensive steel door made to look like wood or upvc.
The black trim usually can't be accessed from the outside on most modern upvc doors, however the panel can easily be kicked out, whether the rubber can be seen from the outside or not. There are only clips holding it in place from the inside so a couple of strong kicks will see the centre panel just pop out.
The most common solution is a PAS24 composite door. They look like wood but they are composite materials, stronger than wood as they flex a little bit. You can improve the security of these further by having them fitted with steel mesh internally. If there are surrounding windows you need to ensure they are laminated. A replacement composite door can usually be fitted for about £600 each with the more secure options.
The proper security steel doors are either expensive or they don't look very 'homely'.
Standard euro locks are not secure though and many composite doors will just fit standard cheap euro locks. Better to replace them with more secure options - see another post of mine relating to locks and doors.