plus fibre and gigabit switch question

[#1]

Hello,
Been with plus for some time on ADSL max.  THen 6 months ago got adsl2 and next wednesday getting fibre on launch-ish day in my village.
Anyway.  Ive been using a Belkin AC1000 router - F9J1104V1 for adsl owning mostly to its 4 gigabit ports.
NOw I've discovered that this router is incompatible with fibre as it does not have a wan port, so getting the plus one for wireless.
However I would like to use the new 8 port gigabit switch I've just got. How do set that up? 
Does it go bt modem thingy > Switch > plus router, or is there some other config I need to do?
Ta

[#2]

Modem > Router > Switch
You'd have the Openreach modem to the router. This would leave three spare ports on the router in one of these you'd plug in your switch.

[#3]

Thanks,
but how would I get gigabit speeds?  I'd like to fire files around my home network between my computers.
dick:quote

[#4]

All you pc's connect to the switch, then only the traffic destined for the net goes through the 100Mb port (to the fibre)

[#5]

Autosensing. 

[#6]

fwiw, if you can disable the DHCP server on the Belkin router, in theory you could use the Belkin as your new gigabit switch.  It can also continue to function as a AC wireless access point too.   You would probably also want to turn off the N wifi on the PN Hub Zero.  
If you previously used the USB sockets on the Belkin for its Twonky(?) DLNA media server, it should work fine provided you change the IP address of the Belkin.  (eg. if the default IP for the PN Hub Zero is 192.168.1.254, then change the Belkin's IP address from default 192.168.2.1 to say 192.168.1.250, before wiring the Belkin to the Plusnet router)

[#7]

Thanks to all. - esp hairybiker.
Seems so obvious now you've said it.  I just thought that because one port was 100, that they would all sync down to lowest common denominator.
Appears not