As this thread has moved to the land of confusion:
End feed fittings require heating with a blowlamp, and solder applying. You also need flux and something to clean the pipe with first, and they can't be used if the pipe has any water in it. They are a permanent solution. Solder ring fittings are similar but have solder in them already so no need to buy that separately.
Compression fittings require tools to tighten them up, but not too much or they will leak. On the other hand they will also leak if not tightened enough. Some individuals like to apply rolls of PTFE tape to the threads so the work can be easily identified as DIY bodgery.
Plastic push fit items do not require any tools, however are not considered as permanent as they can be removed, or in some cases remove themselves.
Metal push fit are similar but often require tools to remove.
Toolstation sell compression stop ends individually:
http://www.toolstation.com/shop/p66318