Screening recommendations - fast growing

Laurel which can be an arse if it starts to get too big.
Running bamboo. BUT, you will need to dig in a restrictive sheet to prevent it ending up 2 miles away.

I've got a couple of Laurels in pots I'd be only too happy to give away despite the protestations of SWMBO

With bamboo there are two types:

Clamping Bamboo (Fargesia and sub plants) - These usually spread out in a circle around the centre of the plant. Approx 5m2
Running Bamboo (Various) - These typically have shallow 'roots' but will just keep running which is why people typically dig in some plastic sheet or equivalent to prevent it running too far. Specialist bamboo suppliers tend to have the sheeting available.

https://bambooplantshq.com/bamboo-screening-plants...

Laurel roots can spread but are usually fairly shallow apart from the tap root which can end up about 10ft deep. Depending on the laurel chosen will depend on how invasive the root system can be.

This can provide a bit of guidance:

https://www.rhs.org.uk/plants/for-places/screening

You could put a row of pots along the inside of your wall with plants in. You can then water them from your downpipes. Then you won't have a root problem?

For reference this is a Fargesia Robusta Campbell I put in either 3 or 4 years ago.

First thoughts are various hedge plants.
But you might get a quicker result with various climbers on a trellis.

Evergreen is obviously good for 12 month screening, but I would consider a mixture of stuff.
You can always remove some in future years when the slower growing stuff gets established.
You don't need 100% coverage to tone down the view of te crap behind.

I'm no gardner, but I too was going to suggest climbers on a trellis. Roots wouldn't damage a sewer. Maybe an evergreen clematis?

Have a look at Portuguese laurel - Prunus Lusitanica. Smaller leaved and less unruly than cherry laurel.

Irish Yew- taxus baccata fastigiata is extremely resilient and has a nice tight upright growth habit. Varieties like "david" have some variation in colour which is a bit more interesting than English yew

Italian Cypress- Cupressus Sempervirens Pyramidalis
"Totem" has a neat upright habit and looks very nice in rows.

Pittosporum tenuifolium- varities like 'arundel green" and "garnetii"

Griselinia littoralis is a good evergreen hedging staple.

Privet - Ligustrum ovalifolium.
Hornbeam - carpinus betulus
Beech - fagus sylvatica / sylvatica purpurea
Classic hedging staples commonly sold as bare root plants but it's the wrong time of year for that now.

Depending on soil suitability a row of Cammelia japonica can look very good and can be pruned and shaped like hedging.
pieris also work well on more acidic soil.

Japanese barberry -berberis thunbergii works very well as hedging. Looks for rocket varieties that are more upright than spreading..lots of nice colours from deep burgundy reds to bright yellow/green

Californian lilac -ceanothus is another good one. Lots of shapes and sizes that can be pruned to shape.as required .Fantastic blue flowers in april/may. my favourites are "italian skies" and "concha".

(Fargesia) Bamboo in pots isn't a great idea as it will need lots of watering. It also drops leaves constantly and doesn't really do well without some shelter from wind.

Whatever you choose it is worth putting some effort into improving soil conditions before planting by addition of compost/manure/soil improver and horticultural sand or grit. Using mycorrhizal fungi planting additive is also a good move and makes a real difference to plant helath and vigour.

Ivy on wire mesh fence, if you used angle iron metal posts screwed to the wall it wouldn't blow down. Very easy to grow and won't need much care once established

Would you be terribly offended if I suggested something artificial? Plenty of options available.

This is what we did , ripped out the hedge & put up a fence , so much easier & neater .