Top 20 clubs by stadium investment according to latest figures from UEFA

Football stadiums have improved almost beyond recognition in the past decade.

As Europe's top football clubs rake in the cash, they've invested in new, modern arenas as well as updating traditional grounds.

But who's invested the most? 

We have the answer - at least, up to 2015, because that is the period covered by the latest .

The fact it is based on the 2015 financial year probably explains the exclusion of Liverpool, whose Anfield stadium has been revamped since then, while it also explains why White Hart Lane is included.