Solved: Internet Connection Dropping every 20 minutes

Hi everyone. For the past couple of weeks i am having an issue with my internet connection dropping and reconnecting over 40 times a day. Very annoying.

Here is an extract from the router log:-

Any ideas? Please

[Admin login] from source 192.168.0.11, Tuesday, Jan 07,2014 14:51:34
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 14:51:29
[DHCP IP: (192.168.0.6)] to MAC address 90:18:7C:7C:C1:66, Tuesday, Jan 07,2014 14:49:56
[Internet connected] IP address: 78.145.105.75, Tuesday, Jan 07,2014 14:40:17
[Internet disconnected] Tuesday, Jan 07,2014 14:40:06
[Time synchronized with NTP server] Tuesday, Jan 07,2014 14:19:17
[Internet connected] IP address: 78.145.105.75, Tuesday, Jan 07,2014 14:19:07
[DHCP IP: (192.168.0.3)] to MAC address E0:B9:BA:D3:9B:5B, Tuesday, Jan 07,2014 14:19:01
[Admin login] from source 192.168.0.11, Tuesday, Jan 07,2014 14:18:54
[DHCP IP: (192.168.0.6)] to MAC address 90:18:7C:7C:C1:66, Tuesday, Jan 07,2014 14:18:16
[DSL Event] DSL: Up Tuesday, Jan 07,2014 14:18:14
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 14:18:07
[DSL Event] DSL: Down Tuesday, Jan 07,2014 14:17:56
[Initialized, firmware version: V1.0.0.46_7.0.44] Tuesday, Jan 07,2014 14:17:54
[DSL Event] DSL: Up Tuesday, Jan 07,2014 14:17:53
[Internet disconnected] Tuesday, Jan 07,2014 14:17:48
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 14:12:42
[DHCP IP: (192.168.0.12)] to MAC address 24:EC:99:82:71:62, Tuesday, Jan 07,2014 14:03:38
[DHCP IP: (192.168.0.3)] to MAC address E0:B9:BA:D3:9B:5B, Tuesday, Jan 07,2014 14:00:46
[Internet connected] IP address: 92.28.196.150, Tuesday, Jan 07,2014 13:59:45
[Internet disconnected] Tuesday, Jan 07,2014 13:59:34
[DHCP IP: (192.168.0.6)] to MAC address 90:18:7C:7C:C1:66, Tuesday, Jan 07,2014 13:47:24
[UPnP set event: Public_UPNP_C3] from source 192.168.0.9, Tuesday, Jan 07,2014 13:45:05
[DHCP IP: (192.168.0.9)] to MAC address 00:1D:D8:6A:E9:E1, Tuesday, Jan 07,2014 13:44:45
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 13:43:58
[Admin login] from source 192.168.0.11, Tuesday, Jan 07,2014 13:42:00
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 13:38:48
[Internet connected] IP address: 92.21.186.74, Tuesday, Jan 07,2014 13:38:35
[Internet disconnected] Tuesday, Jan 07,2014 13:38:25
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 13:38:14
[Internet connected] IP address: 92.28.205.131, Tuesday, Jan 07,2014 13:16:56
[Internet disconnected] Tuesday, Jan 07,2014 13:16:46
[DHCP IP: (192.168.0.10)] to MAC address 7C:C5:37:F2:1D:48, Tuesday, Jan 07,2014 13:14:58
[Admin login] from source 192.168.0.11, Tuesday, Jan 07,2014 13:00:02
[Internet connected] IP address: 2.100.8.55, Tuesday, Jan 07,2014 12:55:47
[Internet disconnected] Tuesday, Jan 07,2014 12:55:36
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 12:54:54
[Internet connected] IP address: 92.21.174.44, Tuesday, Jan 07,2014 12:35:07
[Internet disconnected] Tuesday, Jan 07,2014 12:34:57
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 12:34:29
[UPnP set event: Public_UPNP_C3] from source 192.168.0.9, Tuesday, Jan 07,2014 12:34:13
[DHCP IP: (192.168.0.9)] to MAC address 00:1D:D8:6A:E9:E1, Tuesday, Jan 07,2014 12:34:11
[DHCP IP: (192.168.0.2)] to MAC address C0:3E:0F:0A:09:3A, Tuesday, Jan 07,2014 12:32:57
[DHCP IP: (192.168.0.6)] to MAC address 90:18:7C:7C:C1:66, Tuesday, Jan 07,2014 12:32:54
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 12:32:52
[DHCP IP: (192.168.0.3)] to MAC address E0:B9:BA:D3:9B:5B, Tuesday, Jan 07,2014 12:32:51
[DHCP IP: (192.168.0.4)] to MAC address 08:60:6E:38:1E:5D, Tuesday, Jan 07,2014 12:32:49
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 12:32:23
[DHCP IP: (192.168.0.9)] to MAC address 00:1D:D8:6A:E9:E1, Tuesday, Jan 07,2014 12:32:16
[DHCP IP: (192.168.0.2)] to MAC address C0:3E:0F:0A:09:3A, Tuesday, Jan 07,2014 12:32:13
[DHCP IP: (192.168.0.4)] to MAC address 08:60:6E:38:1E:5D, Tuesday, Jan 07,2014 12:32:12
[Admin login] from source 192.168.0.11, Tuesday, Jan 07,2014 12:29:11
[DHCP IP: (192.168.0.11)] to MAC address A4:17:31:A4:C3:D0, Tuesday, Jan 07,2014 12:25:55
[Internet connected] IP address: 92.26.213.86, Tuesday, Jan 07,2014 12:14:28
[Internet disconnected] Tuesday, Jan 07,2014 12:14:17
[Internet connected] IP address: 92.26.213.235, Tuesday, Jan 07,2014 11:52:18