The final flourishing of Gothic in Britain was the Perpendicular period (1375-1530+). The name suggests its chief characteristic - strong vertical lines in window tracery and wall paneling. Vaults were elaborate fan shapes, and the flying buttress became a flowing, decorative feature (as well as supplying its essential supporting strength).
King's College Chapel,
Cambridge Towers in particular were elaborately decorated and pinnacled, and windows became massive, traceried spider-webs of stone like lace. Wall space was at a minimum, which had the effect of introducing a wonderful feeling of light and spaciousness into the interior of these buildings. Some of the many excellent Perpendicular Gothic buildings to see today include King's College Chapel, Cambridge , (1446-1515), Henry VII's chapel at Westminster Abbey (1503-19), and Bath Abbey (1501-39). The naves of Canterbury Cathedral and Winchester Cathedral were also rebuilt in the Perpendicular style during this time.
All of the examples cited in this article are cathedrals. This is because it was generally only in the great churches that the architects of the time were given creative license. But there are also less exalted examples to be found.
Most parish churches in Britain date from the Medieval Gothic period, and it can be a fascinating exercise to trace the changes in style as the church was remodelled over time. You can often find simple Early English elements cheek-by-jowl with Decorated and Perpendicular additions.
Some of my personal favourites include the parish churches at Northleach (Gloucestershire) and Wedmore (Somerset), but there are wonderful examples scattered in villages all across Britain. What's your favourite?
Glossary of Medieval Church Architecture
Italian Gothic cathedrals use lots of colour, both outside and inside. On the outside, the facade is often decorated with marble. On the inside, the walls are often painted plaster. The columns and arches are often decorated with bright coloured paint. There are also mosaics with gold backgrounds and beautifully tiled floors is geometric patterns. The facades often have an open porch with a wheel windows above it. There is often a dome at the centre of the building. The bell tower is hardly ever attached to the building, because Italy has quite a few earthquakes. The windows are not as large as in northern Europe and, although stained glass windows are often found, the favorite way of decorating the churches is fresco (wall painting). 
The local availability of materials affected both construction and style. In France , limestone was readily available in several grades, the very fine white limestone of Caen being favoured for sculptural decoration. England had coarse limestone and red sandstone as well as dark green Purbeck marble which was often used for architectural features. In Northern Germany , Netherlands , northern Poland , Denmark , and the Baltic countries local building stone was unavailable but there was a strong tradition of building in brick. The resultant style, Brick Gothic , is called Backsteingotik in Germany and Scandinavia and is associated with the Hanseatic League . In Italy , stone was used for fortifications, so brick was preferred for other buildings. Because of the extensive and varied deposits of marble, many buildings were faced in marble, or were left with undecorated façade so that this might be achieved at a later date. The availability of timber also influenced the style of architecture, with timber buildings prevailing in Scandinavia . Availability of timber affected methods of roof construction across Europe. It is thought that the magnificent hammerbeam roofs of England were devised as a direct response to the lack of long straight seasoned timber by the end of the Medieval period, when forests had been decimated not only for the construction of vast roofs but also for ship building.