WMA 10 Hotpoint firsy edition

Possibly the following slime flux, but that is not something I could be sure it is from your description.

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http://shadetreeexpert.com/tree-diseases/

Curiously, wetwood and the associated slime flux help protect the infected tree. The bacterial growth creates conditions in the wood and slime that inhibit wood decay organisms. Furthermore, if the slime flux continues to flow over a number of years, the liquid that is toxic to other organisms can discolor the bark, kill moss and lichens on the bark and even kill grass at the base of the tree. The stain on the bark can be either light or dark color. There is no treatment for slime flux but that fact may not stop insistent garden center sales clerks from selling homeowners "a cure" anyway. In the past arborists would insert a tube in the tree to allow the slime flux to flow more freely and drip onto the ground. But this technique is no longer recommended because it doesn't improve the problem and the hole for the tube is just one more injury to the tree.
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Disease and Fungus
Be on the lookout for bark diseases in globe willow. One of the worst is slime flux disease. Symptoms include a smelly, frothy slime that oozes from branch bark. The ooze is from bacterial activity inside the branch, which forces sap out under pressure. There's no cure for slime flux. All you can do is make sure the tree gets enough water, and prune away the dead and diseased wood wherever you can. Clean pruning tools after use to avoid transmitting disease to other trees.
https://www.hunker.com/13428992/natural-problems-of-globe-willow-trees


https://www.hunker.com/13428992/natural-problems-of-globe-willow-trees

The following video is of a Hotpoint WF door seal replacement which is the same as the WMA series except the fascia panel is slightly different, make sure you take a photo of the wiring connections before you remove the fascia so you know where they go when you replace it

http://www.selfix-uk.co.uk/Video_page_washing_machine_door_seal.html

Cleaning the rubber door gasket will not get rid of the slime issue. The slime comes from buildup on the outside of the washer drum. There are two causes for this. First, if you always close the washer door after use, then the moisture inside the drum cannot dissipate and the slime can form. Also, using the wrong type of detergent (or an excessive amount of the correct detergent) can cause the slime. There are front load washer cleaning products that you can purchase and run to clean the slime from the outside of the drum.

i had this trouble for ages, u have to tip it on its side or bck as the filter is up underneath

Remove the lower rear panel of washer.
Locate and remove the large black hose fastened to bottom of drum.
Remove and clean plastic filter inside the hose, reassmble and test for leaks.
Have some cloths ready to mop up any water that may appear..

Sounds like there is too much water left in the drum as it goes into the spin cycle, and the centrifugal force of the drum spinning is forcing the wate past the door seal probably, needs the filter cleaning, or the door seal itself may require replacing.

Just a thought but you never tampered with the water level on the pressure switch did you? This would give off similar faults. It could be the pressure switch itself or the chamber is partially blocked it could be a broken or loose tacho wire on the motor. Or it could be a fault on the main control board.

Since this happened from day 1, your water may be the problem. Do you have well water? If so, get a softener system. This will get rid of the iron, which is responsible for rust stains. I really doubt that a new machine would cause rust or grease.

Why didn't you do something five years ago when you first noticed this? It will be much more difficult to get a resolution from the manufacturer after5 years.

Most likely something stuck in the pump. Remove front panel and hose that goes into pump. usually you will see the object. if not remove pump and look inside.