So you have power out there... do you have cellular service?

I have some suggestions on this... may work out cheaper than a regular internet connection, provided you don't mind hacking a bit.

So you could do a couple of things.

I presume you have 4G LTE wherever you are in GB... I use Verizon... not sure what company you'd want to use.

I have one of these:




That's a Verizon Jetpack.  It takes a cellular SIM card, gives you local wifi, and connects to the internet via cellular WAN.  You can use it to get on the internet with your laptop, tablet... or even wifi-capable IP camera (like some of the Hikvisions).  It supports multiple wireless devices, and you could use that as your internet connection.  Simply set up your cameras to trigger (via whatever method), and send out email images to a dedicated CCTV email account (that way you can set up specific alerts).  Set up notifications on your cell phone for that specific email service (gmail, yahoo, whatever) to alert you whenever an email comes in.  

Now you have live, real-time alerts (with pictures in the emails)... for probably ten bucks a month.

If you need a MUCH more robust solution, you could go with one of these:




That's a Cisco C819HG Integrated Services Router.  I have several of these, and use them for severe-duty locations (non-air-conditioned enclosures out in the sun, mobile applications, etc... they are dust/vibration resistant, and will tolerate temps up to 140F).  More configuration is required (and you might need a Cisco guy to help you... or just get a Cisco support account for about $50/year, if you're geek enough to configure it yourself.  If you can run a serial console, you can probably handle it)

It also takes a SIM card, and gives you internet over Cellular WAN... with many more configuration options, as well as hard-wired options.  

Here is an article that mentions them

Here is a video on how to configure one:

The Cisco device is basically a cellular router.  Anywhere you've got cell service, you'd have internet... and I get that for about $10/month (it counts against your data allowance, of course).  

You could pair a Ubiquiti device with it, and have local Wifi, with connectivity over the cellular network.  

I'm doing something like that with a Ubiquiti Picostation, and one of those ISRs.

With this rig:




I cable-tied the Picostation and its power-brick to the side of the Cisco ISR, and configured it to use the ISR as its gateway.  If I power that up, I have wifi anywhere I have cell service... and in locations/conditions that a regular Jetpack wouldn't be able to survive.

ETA:  not to mention those ISRs allow you to use external antennas.  The tiny little antenna in your cell phone sucks by comparison.  Those ISRs allow yagis, panels, large omnis, and other higher-gain antennas to be used if needed.  You can even deploy those ISRs up on towers and other inhospitable locations to improve your signal.  That allows you to have solid cellular internet in remote locations where your cell phone says "No Service"

Correct.  That Cisco box only uses about 6 Watts of power, so it doesn't have the ability to do PoE.  

I really like the Hikvision stuff in sheer bang-for-buck terms.  It is Chicom gear, so if that's very important to you, you should know that up-front.  

If you only want alert emails at night, you can set up your motion-detection triggers to only be active during certain hours.

Interesting... hadn't see that.  What type of jack/port does it have?

I looked it up... it's one of those dinky little CRC or MCX jacks.  I always hated those... the plugs are incredibly fragile, and breaking them is really easy.  They used to use the same connectors on certain PCMCIA WLAN cards that allowed external antennas back in the day.  

Also, it only has a single connection, so diversity antennas aren't possible.  The latter can really help throughput... by up to 50% in some cases.