I can't access any of the log files :/

addshore@stat1002:/a/log/webrequest/archive/dumps.wikimedia.org$ tail access.log-20160501
tail: cannot open ‘access.log-20160501’ for reading: Permission denied
addshore@stat1002:/a/log/webrequest/archive/dumps.wikimedia.org$ ls -la
total 32570740
drwxr-xr-x 2 stats stats 12288 May 9 09:00 .
drwxr-xr-x 15 stats wikidev 4096 Mar 4 10:32 ..
-rw-r----- 1 root root 188745991 May 9 04:55 access.log
-rw-r----- 1 root root 8904475 Feb 9 06:25 access.log-20160209.gz
-rw-r----- 1 root root 9909263 Feb 10 06:25 access.log-20160210.gz
-rw-r----- 1 root root 11850329 Feb 11 06:25 access.log-20160211.gz
-rw-r----- 1 root root 15232097 Feb 12 06:25 access.log-20160212.gz
-rw-r----- 1 root root 12481093 Feb 13 06:25 access.log-20160213.gz

Permissions need fixing