How UK addressable TV targeting actually works

A conventional television spot buys everyone watching a programme at a time. Addressable television buys the households you selected, wherever in the schedule they happen to be, by substituting your ad for the one that would otherwise have played. In the UK that substitution happens at the Sky or Virgin set-top box on linear inventory, and in the stream on broadcaster video-on-demand.

The substitution also sets the targeting vocabulary. If you are buying a slot, you talk about programmes, dayparts and audience delivery against a demographic. If you are buying households, you talk about attributes the broadcaster's data partner holds against an address, and about the postcode geography those addresses sit in. Everything awkward about addressable TV targeting follows from that one substitution, including the fact that the selection is made before anybody sits down in front of the television.

Because the buy is a household selection rather than a share of an audience, it is also sold differently, with a minimum spend rather than a minimum weight. Sky's AdSmart site advertises TV from as little as £3,000, and that is the figure to plan a first burst around.

An addressable selection is an intersection of household attributes with a list of postcode districts and the broadcast regions those districts sit in. AdBuyMCP's catalogue takes up to four attributes from its Sky AdSmart attribute list, which labels them as derived from Experian Mosaic and CACI, and picks them by matching an audience's own terms against catalogue keywords rather than by asking a language model to name a segment.

A model that emits a segment identifier can emit one that does not exist, and a plausible-looking identifier is indistinguishable from a real one until a sales house rejects the booking. Registry lookup can only ever return an attribute that is in the catalogue.

Three of the channels in AdBuyMCP's catalogue have a fidelity score that varies with the quality of the brief: CTV, paid search and paid social. Addressable TV is not one of them. It is fixed at 55 out of 100 with a household grade, and the compiler's own rationale says why: household-level proxy, Mosaic and CACI attribute combinations intersected with postcode districts, strong geographic precision, firmographics approximated by household affluence and occupation attributes.

A fixed score means there is no version of your brief that makes addressable TV a person-level buy, and no amount of budget that changes the grade. If you need to know that the person watching holds a particular role, this channel cannot tell you that, and the number summarises how far from that claim it sits.

The score changes only when you name a city the geography table cannot map. That costs fifteen points, and the rationale names the city, so an unmappable geography is visible rather than quietly dropped. Separately, and without changing the score at all, where a brief carries firmographics the compiler attaches a warning in plain words: B2B on addressable TV is a household proxy, and the attributes describe the household, not the job title.

Sky advertises AdSmart from £3,000, which makes that the seller's entry point for an addressable burst.

The AdSmart attribute set is part of Sky's product, so you do not buy the audience as a separate data segment; on streaming TV, some sellers do charge for the audience on top of the media. The cost to budget separately here is production: television copy has to be delivered as a broadcast-quality mezzanine, and it has to clear.

The constraint that surprises buyers new to UK television is Clearcast clearance rather than the media. Every commercial has to be cleared before it can be broadcast, and the clearance carries a clock number that the booking is made against. Clearcast asks advertisers to allow two to three weeks for the whole process; its FAQ puts script feedback within three working days and approval of a final clocked ad at about two working days. AdBuyMCP's AdSmart booking workflow allows fourteen days including clearance, which is the shortest case, so plan on three weeks.

That is why a creative pre-check is worth running before anything is commissioned rather than after. AdBuyMCP's pre-check predicts the flags Clearcast, the CAA and publishers are likely to raise, and where you declare that you hold substantiation for a claim, it records the declaration and states plainly that it has not assessed your evidence. The pre-check predicts and Clearcast decides; what the prediction buys you is finding out that your headline claim needs substantiation before you have paid for the film.

The practical planning rule: work backwards from the on-air date by three weeks for the clearance and the booking, and add the production time for a broadcast master on top of that. A campaign that needs to be live next Monday is not an addressable TV campaign.

Sky AdSmart has no self-serve buying API: a sales house books it. The work around that booking is paperwork and tracking, and AdBuyMCP's AdSmart booking workflow shows its shape. It generates a booking document naming the attribute combination, the postcode districts, the flight and the estimated addressable household universe; drives the Clearcast submission; prepares the submission to the accredited-partner portal; waits for the sales house to confirm; and finally reconciles box-level impressions against the booked universe.

It is the right line when your audience is geographically concentrated, when household affluence or occupation is a decent proxy for the person you want, and when you want television's attention profile without national television's price. A regional retailer with twenty catchments, a B2B business whose buyers cluster in a handful of city centres, a service that is only sold in three broadcast regions: all of these are better served by an addressable buy than by a spot buy, and the geography is what makes them measurable afterwards.

It is the wrong line when the account list is the audience. If the requirement is to reach eleven named companies, addressable television cannot do it and nothing in this market can. It is also the wrong line at the bottom of the budget range: at a £3,000 minimum burst against a total monthly media budget of £5,000, television is the whole plan rather than a channel in it.

Addressable TV sits outside an AdBuyMCP awareness plan. The plan reaches households through streaming TV instead, aimed at a business market with business data where a seller offers it.