Campaigners are splurging out on a family fun day tomorrow (Sat) on the banks of the Thames to warn off planners who they fear want to turn their park into a seven-year building site.

They are organising a big birthday bash to mark the 89th anniversary of Shadwell’s King Edward Memorial Park being formally opened as ‘a gift to the people of the East London’.

A big chunk has been earmarked by Thames Water to construct London’s proposed ‘super sewer’ stretching 17 miles from Brentford to the Isle of Dogs, aimed at relieving the ageing Victorian system that now regularly overflows into the river whenever it pours.

The scheme would also leave a ‘legacy’ of a 45ft sewer ventilation shaft on the foreshore overlooking the remainder of the park and overshadowing homes in the area.

“It’s the only open space we have in one of London’s most-deprived areas,” said the campaign’s Toni Davey.

“We’ll continue to deliver a clear message to Thames Water again, in plain English, to leave our park alone!”

So they’re tackling the sewer threat tomorrow from 12 noon to 5pm with a bit of magic for the kids, as well as face painting, cookie decorating, butterfly feeder making, giant bubbles, sports, arts and crafts and a bouncy castle.

Mums and dads also get free yoga and Thai chi, music and theatre at the park in Glamis Road, off The Highway, which was dedicated to the memory of King Edward VII in June, 1922.